NAICS Codes by Business Activity: O

346 business activities

Business activity NAICS code Size standard
Oak extract manufacturing325194 Cyclic Crude, Intermediate, and Gum and Wood Chemical Manufacturing1,250 employees
Oars, wood, manufacturing321999 All Other Miscellaneous Wood Product Manufacturing500 employees
Oat farming, field and seed production111199 All Other Grain Farming$2.3 million in average annual receipts
Oat flour manufacturing311211 Flour Milling1,050 employees
Oatmeal (i.e., cereal breakfast food) manufacturing311230 Breakfast Cereal Manufacturing1,300 employees
Oats, breakfast cereal, manufacturing311230 Breakfast Cereal Manufacturing1,300 employees
Oats, rolled (i.e., cereal breakfast food), manufacturing311230 Breakfast Cereal Manufacturing1,300 employees
Obedience training services, pet812910 Pet Care (except Veterinary) Services$9 million in average annual receipts
Oboes manufacturing339992 Musical Instrument Manufacturing1,000 employees
Observation towers713990 All Other Amusement and Recreation Industries$9 million in average annual receipts
Observatories (except research institutions)712110 Museums$34 million in average annual receipts
Observatories, research institutions541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)1,000 employees
Obstetrical hospital622310 Specialty (except Psychiatric and Substance Abuse) Hospitals$47 million in average annual receipts
Obstetricians' offices (e.g., centers, clinics)621111 Offices of Physicians (except Mental Health Specialists)$16 million in average annual receipts
Ocarinas manufacturing339992 Musical Instrument Manufacturing1,000 employees
Occupational safety and health administration926150 Regulation, Licensing, and Inspection of Miscellaneous Commercial Sectors—
Occupational safety and health standards agencies926150 Regulation, Licensing, and Inspection of Miscellaneous Commercial Sectors—
Occupational therapists' associations813920 Professional Organizations$23.5 million in average annual receipts
Occupational therapists' offices (e.g., centers, clinics)621340 Offices of Physical, Occupational and Speech Therapists, and Audiologists$12.5 million in average annual receipts
Oceanographic research and development laboratories or services541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)1,000 employees
Ocher mining and/or beneficiating212393 Other Chemical and Fertilizer Mineral Mining500 employees
Ocher pigments manufacturing325130 Synthetic Dye and Pigment Manufacturing1,050 employees
Octophones manufacturing339992 Musical Instrument Manufacturing1,000 employees
Octopus fishing114112 Shellfish Fishing$14 million in average annual receipts
ODs' (doctors of optometry) offices (e.g., centers, clinics)621320 Offices of Optometrists$9 million in average annual receipts
Oerlikon guns manufacturing332994 Small Arms, Ordnance, and Ordnance Accessories Manufacturing1,000 employees
Off campus dormitories721310 Rooming and Boarding Houses, Dormitories, and Workers' Camps$14 million in average annual receipts
Off-highway tracked vehicles (except construction, armored military) manufacturing336999 All Other Transportation Equipment Manufacturing1,000 employees
Off-highway trucks manufacturing333120 Construction Machinery Manufacturing1,250 employees
Off-road all-terrain vehicles (ATVs), wheeled or tracked, dealers441228 Motorcycle, ATV, and All Other Motor Vehicle Dealers$35 million in average annual receipts
Off-road all-terrain vehicles (ATVs), wheeled or tracked, manufacturing336999 All Other Transportation Equipment Manufacturing1,000 employees
Off-track betting parlors713290 Other Gambling Industries$40 million in average annual receipts
Offender self-help organizations624190 Other Individual and Family Services$16 million in average annual receipts
Office administration services561110 Office Administrative Services$12.5 million in average annual receipts
Office automation computer systems integration design services541512 Computer Systems Design Services$34 million in average annual receipts
Office building construction236220 Commercial and Institutional Building Construction$45 million in average annual receipts
Office building rental or leasing531120 Lessors of Nonresidential Buildings (except Miniwarehouses)$34 million in average annual receipts
Office cleaning services561720 Janitorial Services$22 million in average annual receipts
Office equipment merchant wholesalers423420 Office Equipment Merchant Wholesalers200 employees
Office furniture (except wood), padded, upholstered, or plain (except wood), manufacturing337214 Office Furniture (except Wood) Manufacturing1,100 employees
Office furniture merchant wholesalers423210 Furniture Merchant Wholesalers100 employees
Office furniture rental or leasing532420 Office Machinery and Equipment Rental and Leasing$40 million in average annual receipts
Office furniture stores442110 Furniture Stores$22 million in average annual receipts
Office furniture, modular system, installation238390 Other Building Finishing Contractors$19 million in average annual receipts
Office furniture, padded, upholstered, or plain wood, manufacturing337211 Wood Office Furniture Manufacturing1,000 employees
Office help supply services561320 Temporary Help Services$34 million in average annual receipts
Office machine repair and maintenance services (except communication equipment)811212 Computer and Office Machine Repair and Maintenance$30 million in average annual receipts
Office machinery and equipment rental or leasing532420 Office Machinery and Equipment Rental and Leasing$40 million in average annual receipts
Office machines merchant wholesalers423420 Office Equipment Merchant Wholesalers200 employees
Office management services561110 Office Administrative Services$12.5 million in average annual receipts
Office paper (e.g., computer printer, photocopy, plain paper) made in paper mills322121 Paper (except Newsprint) Mills1,250 employees
Office paper (e.g., computer printer, photocopy, plain paper), cut sheet, made from purchased paper322230 Stationery Product Manufacturing750 employees
Office supplies (except furniture, machines) merchant wholesalers424120 Stationery and Office Supplies Merchant Wholesalers150 employees
Office supplies, die-cut paper, made from purchased paper or paperboard322230 Stationery Product Manufacturing750 employees
Office supply pools561320 Temporary Help Services$34 million in average annual receipts
Office supply stores453210 Office Supplies and Stationery Stores$35 million in average annual receipts
Offset inks manufacturing325910 Printing Ink Manufacturing750 employees
Offset plate preparation services323120 Support Activities for Printing550 employees
Offset printing (except books, manifold business forms, printing grey goods)323110 Commercial Lithographic PrintingRetired code (NAICS 2007)—
Offset printing (except books, printing grey goods)323111 Commercial Printing (except Screen and Books)650 employees
Offset printing presses manufacturing333244 Printing Machinery and Equipment Manufacturing750 employees
Offshore crude petroleum production211120 Crude Petroleum Extraction1,250 employees
Offshore natural gas production211130 Natural Gas Extraction1,250 employees
Ohmmeters manufacturing334515 Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals750 employees
Oil (i.e., petroleum) refineries324110 Petroleum Refineries1,500 employees
Oil additive preparations manufacturing325998 All Other Miscellaneous Chemical Product and Preparation Manufacturing650 employees
Oil additives made in petroleum refineries324110 Petroleum Refineries1,500 employees
Oil additives merchant wholesalers424690 Other Chemical and Allied Products Merchant Wholesalers175 employees
Oil and gas field development for own account211120 Crude Petroleum Extraction1,250 employees
Oil and gas field distribution line construction237120 Oil and Gas Pipeline and Related Structures Construction$45 million in average annual receipts
Oil and gas field exploration for own account211120 Crude Petroleum Extraction1,250 employees
Oil and gas field services (except contract drilling, site preparation and related construction contractor activities) on a contract basis213112 Support Activities for Oil and Gas Operations$47 million in average annual receipts
Oil and gas field-type drilling machinery and equipment (except offshore floating platforms) manufacturing333132 Oil and Gas Field Machinery and Equipment Manufacturing1,250 employees
Oil and gas offshore floating platforms manufacturing336611 Ship Building and Repairing1,300 employees
Oil and gas well drilling services (redrilling, spudding, tailing) on a contract basis213111 Drilling Oil and Gas Wells1,000 employees
Oil burner installation238220 Plumbing, Heating, and Air-Conditioning Contractors$19 million in average annual receipts
Oil burners, heating, manufacturing333414 Heating Equipment (except Warm Air Furnaces) Manufacturing500 employees
Oil burners, heating, merchant wholesalers423720 Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers200 employees
Oil change and lubrication shops, automotive811191 Automotive Oil Change and Lubrication Shops$11 million in average annual receipts
Oil drilling muds merchant wholesalers424690 Other Chemical and Allied Products Merchant Wholesalers175 employees
Oil field exploration (except surveying) on a contract basis213112 Support Activities for Oil and Gas Operations$47 million in average annual receipts
Oil field machinery and equipment rental or leasing532412 Construction, Mining, and Forestry Machinery and Equipment Rental and Leasing$40 million in average annual receipts
Oil field road construction237310 Highway, Street, and Bridge Construction$45 million in average annual receipts
Oil filters, automotive, merchant wholesalers423120 Motor Vehicle Supplies and New Parts Merchant Wholesalers200 employees
Oil filters, automotive, truck, and bus, manufacturing336390 Other Motor Vehicle Parts Manufacturing1,000 employees
Oil kernels merchant wholesalers424590 Other Farm Product Raw Material Merchant Wholesalers175 employees
Oil lease brokers' offices523999 Miscellaneous Financial Investment Activities$47 million in average annual receipts
Oil line drip, natural gas liquid211130 Natural Gas Extraction1,250 employees
Oil measuring and dispensing pumps manufacturing333913 Measuring and Dispensing Pump Manufacturing333914 Measuring, Dispensing, and Other Pumping Equipment Manufacturing—750 employees
Oil nuts merchant wholesalers424590 Other Farm Product Raw Material Merchant Wholesalers175 employees
Oil pipeline construction237120 Oil and Gas Pipeline and Related Structures Construction$45 million in average annual receipts
Oil refinery construction237120 Oil and Gas Pipeline and Related Structures Construction$45 million in average annual receipts
Oil royalty companies533110 Lessors of Nonfinancial Intangible Assets (except Copyrighted Works)$47 million in average annual receipts
Oil royalty dealing (i.e., acting as a principal in dealing royalties to investors)523910 Miscellaneous Intermediation$47 million in average annual receipts
Oil royalty leasing533110 Lessors of Nonfinancial Intangible Assets (except Copyrighted Works)$47 million in average annual receipts
Oil sampling services on a contract basis213112 Support Activities for Oil and Gas Operations$47 million in average annual receipts
Oil seals manufacturing339991 Gasket, Packing, and Sealing Device Manufacturing600 employees
Oil shale mining and/or beneficiating211120 Crude Petroleum Extraction1,250 employees
Oil spill cleanup services562910 Remediation Services$25 million in average annual receipts
Oil storage tanks, heavy gauge metal, manufacturing332420 Metal Tank (Heavy Gauge) Manufacturing750 employees
Oil water separators manufacturing333318 Other Commercial and Service Industry Machinery Manufacturing1,000 employees
Oil well drilling machinery and equipment rental or leasing532412 Construction, Mining, and Forestry Machinery and Equipment Rental and Leasing$40 million in average annual receipts
Oil well drilling on a contract basis213111 Drilling Oil and Gas Wells1,000 employees
Oil well logging on a contract basis213112 Support Activities for Oil and Gas Operations$47 million in average annual receipts
Oil well machinery and equipment merchant wholesalers423830 Industrial Machinery and Equipment Merchant Wholesalers100 employees
Oil well rig building, repairing, and dismantling, on a contract basis213112 Support Activities for Oil and Gas Operations$47 million in average annual receipts
Oil well supply houses merchant wholesalers423830 Industrial Machinery and Equipment Merchant Wholesalers100 employees
Oil, animal, rendering311613 Rendering and Meat Byproduct Processing750 employees
Oil, corn crude and refined, made by wet milling corn311221 Wet Corn Milling and Starch Manufacturing1,300 employees
Oil, olive, made from purchased oils311225 Fats and Oils Refining and Blending1,100 employees
Oil, petroleum, bulk stations and terminals424710 Petroleum Bulk Stations and Terminals225 employees
Oil, petroleum, merchant wholesalers (except bulk stations, terminals)424720 Petroleum and Petroleum Products Merchant Wholesalers (except Bulk Stations and Terminals)200 employees
Oil, vegetable stearin, made from purchased oils311225 Fats and Oils Refining and Blending1,100 employees
Oil, waste, merchant wholesalers423930 Recyclable Material Merchant Wholesalers125 employees
Oil-based additives made from refined petroleum324199 All Other Petroleum and Coal Products Manufacturing950 employees
Oil-well and oil-field pumps manufacturing333914 Measuring, Dispensing, and Other Pumping Equipment Manufacturing750 employees
Oilcloth manufacturing313320 Fabric Coating Mills1,000 employees
Oiling of purchased textiles and apparel313320 Fabric Coating Mills1,000 employees
Oils (e.g., cutting, lubricating), synthetic, manufacturing325998 All Other Miscellaneous Chemical Product and Preparation Manufacturing650 employees
Oils made by distillation of coal tar325194 Cyclic Crude, Intermediate, and Gum and Wood Chemical Manufacturing1,250 employees
Oils, cooking and salad, merchant wholesalers424490 Other Grocery and Related Products Merchant Wholesalers250 employees
Oils, fuel, manufacturing324110 Petroleum Refineries1,500 employees
Oils, inedible, animal or vegetable, merchant wholesalers424990 Other Miscellaneous Nondurable Goods Merchant Wholesalers100 employees
Oils, lubricating petroleum, made from refined petroleum324191 Petroleum Lubricating Oil and Grease Manufacturing900 employees
Oils, lubricating, synthetic, manufacturing325998 All Other Miscellaneous Chemical Product and Preparation Manufacturing650 employees
Oils, petroleum lubricating, re-refining used324191 Petroleum Lubricating Oil and Grease Manufacturing900 employees
Oils, soluble (i.e., textile finishing assistants), manufacturing325613 Surface Active Agent Manufacturing1,100 employees
Oils, vegetable and animal, medicinal, uncompounded, manufacturing325411 Medicinal and Botanical Manufacturing1,000 employees
Oils, wood, made by distillation of wood325194 Cyclic Crude, Intermediate, and Gum and Wood Chemical Manufacturing1,250 employees
Oilseed and grain combination farming, field and seed production111191 Oilseed and Grain Combination Farming$2.3 million in average annual receipts
Oilseed cake and meal merchant wholesalers424990 Other Miscellaneous Nondurable Goods Merchant Wholesalers100 employees
Oilseed crushing and extracting machinery manufacturing333241 Food Product Machinery Manufacturing500 employees
Oilseed farming (except soybean), field and seed production111120 Oilseed (except Soybean) Farming$2.3 million in average annual receipts
Oilseeds merchant wholesalers424590 Other Farm Product Raw Material Merchant Wholesalers175 employees
Oilstones mining and/or beneficiating212399 All Other Nonmetallic Mineral Mining500 employees
Okra farming, field, bedding plant and seed production111219 Other Vegetable (except Potato) and Melon Farming$3.8 million in average annual receipts
Old age homes without nursing care623312 Assisted Living Facilities for the Elderly$23.5 million in average annual receipts
Old age survivors and disability programs923130 Administration of Human Resource Programs (except Education, Public Health, and Veterans' Affairs Programs)—
Old soldiers' homes without nursing care623312 Assisted Living Facilities for the Elderly$23.5 million in average annual receipts
Olefin fibers and filaments manufacturing325220 Artificial and Synthetic Fibers and Filaments Manufacturing1,050 employees
Olefins made from refined petroleum or liquid hydrocarbons325110 Petrochemical Manufacturing1,300 employees
Oleic acid (i.e., red oil) manufacturing325199 All Other Basic Organic Chemical Manufacturing1,250 employees
Oleic acid esters manufacturing325199 All Other Basic Organic Chemical Manufacturing1,250 employees
Oleum (i.e., fuming sulfuric acid) manufacturing325180 Other Basic Inorganic Chemical Manufacturing1,000 employees
Olive farming111339 Other Noncitrus Fruit Farming$3.5 million in average annual receipts
Olive oil made from purchased oils311225 Fats and Oils Refining and Blending1,100 employees
Olive oil made in crushing mills311224 Soybean and Other Oilseed Processing1,250 employees
Olives brined311421 Fruit and Vegetable Canning1,000 employees
Olives, dried, made in dehydration plant311423 Dried and Dehydrated Food Manufacturing750 employees
Olivine, non-gem, mining and/or beneficiating212325 Clay and Ceramic and Refractory Minerals Mining500 employees
Omnibearing instrumentation manufacturing334511 Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing1,350 employees
On-line access service providers, using client-supplied telecommunications (e.g., dial-up ISPs)517919 All Other Telecommunications$35 million in average annual receipts
On-line access service providers, using own operated wired telecommunications infrastructure517311 Wired Telecommunications Carriers1,500 employees
Oncologists' offices (e.g., centers, clinics)621111 Offices of Physicians (except Mental Health Specialists)$16 million in average annual receipts
One-hour photofinishing services812922 One-Hour Photofinishing$19 million in average annual receipts
Onion farming, field, bedding plant and seed production111219 Other Vegetable (except Potato) and Melon Farming$3.8 million in average annual receipts
Onions pickled311421 Fruit and Vegetable Canning1,000 employees
Onyx marble crushed and broken stone mining and/or beneficiating212319 Other Crushed and Broken Stone Mining and Quarrying550 employees
Onyx marble mining or quarrying212311 Dimension Stone Mining and Quarrying500 employees
Open air motion picture theaters512132 Drive-In Motion Picture Theaters$12.5 million in average annual receipts
Opera companies711110 Theater Companies and Dinner Theaters$25 million in average annual receipts
Opera hats cut and sew apparel contractors315210 Cut and Sew Apparel Contractors750 employees
Opera hats cut and sewn from purchased fabric (except apparel contractors)315990 Apparel Accessories and Other Apparel Manufacturing600 employees
Opera hats, men's and boys', cut and sew apparel contractors315211 Men's and Boys' Cut and Sew Apparel ContractorsRetired code (NAICS 2007)—
Opera hats, women's, girls', and infants', cut and sew apparel contractors315212 Women's, Girls', and Infants' Cut and Sew Apparel ContractorsRetired code (NAICS 2007)—
Opera singers, independent711130 Musical Groups and Artists$15 million in average annual receipts
Operating and launching government satellites927110 Space Research and Technology—
Operating room tables manufacturing339113 Surgical Appliance and Supplies Manufacturing800 employees
Operating systems software, computer, packaged511210 Software Publishers$41.5 million in average annual receipts
Operations research consulting services541614 Process, Physical Distribution, and Logistics Consulting Services$20 million in average annual receipts
Ophthalmic agents, uncompounded, manufacturing325411 Medicinal and Botanical Manufacturing1,000 employees
Ophthalmic goods (except cameras) merchant wholesalers423460 Ophthalmic Goods Merchant Wholesalers175 employees
Ophthalmic instruments and apparatus (except laser surgical) manufacturing339112 Surgical and Medical Instrument Manufacturing1,000 employees
Ophthalmologists' offices (e.g., centers, clinics)621111 Offices of Physicians (except Mental Health Specialists)$16 million in average annual receipts
Ophthalmometers and ophthalmoscopes manufacturing339112 Surgical and Medical Instrument Manufacturing1,000 employees
Opinion research services541910 Marketing Research and Public Opinion Polling$22.5 million in average annual receipts
Opium and opium derivatives (i.e., basic chemicals) manufacturing325411 Medicinal and Botanical Manufacturing1,000 employees
Optical alignment and display instruments (except photographic) manufacturing333314 Optical Instrument and Lens Manufacturing500 employees
Optical disk drives manufacturing334112 Computer Storage Device Manufacturing1,250 employees
Optical goods (except cameras) merchant wholesalers423460 Ophthalmic Goods Merchant Wholesalers175 employees
Optical goods stores (except offices of optometrists)446130 Optical Goods Stores$26 million in average annual receipts
Optical grade calcite mining and/or beneficiating212399 All Other Nonmetallic Mineral Mining500 employees
Optical gun sighting and fire control equipment and instruments manufacturing333314 Optical Instrument and Lens Manufacturing500 employees
Optical instrument repair and maintenance services (e.g. microscopes, telescopes)811219 Other Electronic and Precision Equipment Repair and Maintenance$22 million in average annual receipts
Optical lens making and grinding machinery manufacturing333249 Other Industrial Machinery Manufacturing500 employees
Optical readers and scanners manufacturing334118 Computer Terminal and Other Computer Peripheral Equipment Manufacturing1,000 employees
Optical scanning services518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services$40 million in average annual receipts
Optical test and inspection equipment manufacturing333314 Optical Instrument and Lens Manufacturing500 employees
Optoelectronic devices manufacturing334413 Semiconductor and Related Device Manufacturing1,250 employees
Optometers manufacturing339112 Surgical and Medical Instrument Manufacturing1,000 employees
Optometric equipment and supplies merchant wholesalers423460 Ophthalmic Goods Merchant Wholesalers175 employees
Optometrists' associations813920 Professional Organizations$23.5 million in average annual receipts
Optometrists' offices (e.g., centers, clinics)621320 Offices of Optometrists$9 million in average annual receipts
Oral and maxillofacial surgeons' offices (e.g., centers, clinics)621210 Offices of Dentists$9 million in average annual receipts
Oral contraceptive preparations manufacturing325412 Pharmaceutical Preparation Manufacturing1,300 employees
Oral pathologists' offices (e.g., centers, clinics)621210 Offices of Dentists$9 million in average annual receipts
Orange groves111310 Orange Groves$4 million in average annual receipts
Orange oil manufacturing325998 All Other Miscellaneous Chemical Product and Preparation Manufacturing650 employees
Orchard cultivation services (e.g., bracing, planting, pruning, removal, spraying, surgery)115112 Soil Preparation, Planting, and Cultivating$9.5 million in average annual receipts
Orchard grass seed farming111998 All Other Miscellaneous Crop Farming$2.5 million in average annual receipts
Orchestra conductors, independent711510 Independent Artists, Writers, and Performers$9 million in average annual receipts
Orchestras711130 Musical Groups and Artists$15 million in average annual receipts
Order taking offices of mail-order houses454110 Electronic Shopping and Mail-Order Houses$41.5 million in average annual receipts
Order-taking for clients over the internet561422 Telemarketing Bureaus and Other Contact Centers$25.5 million in average annual receipts
Ordnance and accessories merchant wholesalers423990 Other Miscellaneous Durable Goods Merchant Wholesalers100 employees
Ore and metal refinery construction236210 Industrial Building Construction$45 million in average annual receipts
Ore concentrates merchant wholesalers423520 Coal and Other Mineral and Ore Merchant Wholesalers200 employees
Ore crushing, washing, screening, and loading machinery manufacturing333131 Mining Machinery and Equipment Manufacturing900 employees
Ores (e.g., gold, iron, lead, silver, zinc) merchant wholesalers423520 Coal and Other Mineral and Ore Merchant Wholesalers200 employees
Organ banks, body621991 Blood and Organ Banks$40 million in average annual receipts
Organ donor centers, body621991 Blood and Organ Banks$40 million in average annual receipts
Organic chemicals merchant wholesalers424690 Other Chemical and Allied Products Merchant Wholesalers175 employees
Organic noncellulosic fibers and filaments manufacturing325220 Artificial and Synthetic Fibers and Filaments Manufacturing1,050 employees
Organic pigments, dyes, lakes, and toners manufacturing325130 Synthetic Dye and Pigment Manufacturing1,050 employees
Organization development consulting services541612 Human Resources Consulting Services$29 million in average annual receipts
Organization for Economic Cooperation and Development928120 International Affairs—
Organization of American States928120 International Affairs—
Organizers for closets, drawers, and shelves, plastics, manufacturing326199 All Other Plastics Product Manufacturing750 employees
Organizers of agricultural fairs with facilities711310 Promoters of Performing Arts, Sports, and Similar Events with Facilities$40 million in average annual receipts
Organizers of agricultural fairs without facilities711320 Promoters of Performing Arts, Sports, and Similar Events without Facilities$22 million in average annual receipts
Organizers of arts events with facilities711310 Promoters of Performing Arts, Sports, and Similar Events with Facilities$40 million in average annual receipts
Organizers of arts events without facilities711320 Promoters of Performing Arts, Sports, and Similar Events without Facilities$22 million in average annual receipts
Organizers of festivals with facilities711310 Promoters of Performing Arts, Sports, and Similar Events with Facilities$40 million in average annual receipts
Organizers of festivals without facilities711320 Promoters of Performing Arts, Sports, and Similar Events without Facilities$22 million in average annual receipts
Organizers of live performing arts productions (e.g., concerts) with facilities711310 Promoters of Performing Arts, Sports, and Similar Events with Facilities$40 million in average annual receipts
Organizers of live performing arts productions (e.g., concerts) without facilities711320 Promoters of Performing Arts, Sports, and Similar Events without Facilities$22 million in average annual receipts
Organizers of sports events with facilities711310 Promoters of Performing Arts, Sports, and Similar Events with Facilities$40 million in average annual receipts
Organizers of sports events without facilities711320 Promoters of Performing Arts, Sports, and Similar Events without Facilities$22 million in average annual receipts
Organo-inorganic compound manufacturing325199 All Other Basic Organic Chemical Manufacturing1,250 employees
Organo-phosphate based insecticides manufacturing325320 Pesticide and Other Agricultural Chemical Manufacturing1,150 employees
Oriented strandboard (OSB) manufacturing321219 Reconstituted Wood Product Manufacturing750 employees
Ornamental and architectural plaster work (e.g., columns, mantels, molding) manufacturing327420 Gypsum Product Manufacturing1,500 employees
Ornamental and statuary precast concrete products manufacturing327390 Other Concrete Product Manufacturing500 employees
Ornamental fish production, farm raising112511 Finfish Farming and Fish Hatcheries$3.8 million in average annual receipts
Ornamental ironwork merchant wholesalers423390 Other Construction Material Merchant Wholesalers100 employees
Ornamental metal work installation238190 Other Foundation, Structure, and Building Exterior Contractors$19 million in average annual receipts
Ornamental metalwork manufacturing332323 Ornamental and Architectural Metal Work Manufacturing500 employees
Ornamental plant growing111422 Floriculture Production$3.8 million in average annual receipts
Ornamental tree and shrub services561730 Landscaping Services$9.5 million in average annual receipts
Ornamental woodwork (e.g., cornices, mantels) manufacturing321918 Other Millwork (including Flooring)500 employees
Ornaments, Christmas tree (except electric, glass), manufacturing339999 All Other Miscellaneous Manufacturing550 employees
Ornaments, Christmas tree, electric, manufacturing335129 Other Lighting Equipment Manufacturing500 employees
Ornaments, Christmas tree, glass, made in glass making plants327212 Other Pressed and Blown Glass and Glassware Manufacturing1,250 employees
Ornaments, Christmas tree, made from purchased glass327215 Glass Product Manufacturing Made of Purchased Glass1,000 employees
Orphanages623990 Other Residential Care Facilities$16 million in average annual receipts
Orris oil manufacturing325998 All Other Miscellaneous Chemical Product and Preparation Manufacturing650 employees
Orthodichlorobenzene manufacturing325194 Cyclic Crude, Intermediate, and Gum and Wood Chemical Manufacturing1,250 employees
Orthodontic appliance, custom made in dental laboratories339116 Dental Laboratories500 employees
Orthodontic appliances manufacturing339114 Dental Equipment and Supplies Manufacturing750 employees
Orthodontists' offices (e.g., centers, clinics)621210 Offices of Dentists$9 million in average annual receipts
Orthopedic canes manufacturing339113 Surgical Appliance and Supplies Manufacturing800 employees
Orthopedic device manufacturing and sale in retail environment339113 Surgical Appliance and Supplies Manufacturing800 employees
Orthopedic devices manufacturing339113 Surgical Appliance and Supplies Manufacturing800 employees
Orthopedic equipment and supplies merchant wholesalers423450 Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers200 employees
Orthopedic extension shoes manufacturing339113 Surgical Appliance and Supplies Manufacturing800 employees
Orthopedic hosiery, elastic, manufacturing339113 Surgical Appliance and Supplies Manufacturing800 employees
Orthopedic hospitals622310 Specialty (except Psychiatric and Substance Abuse) Hospitals$47 million in average annual receipts
Orthopedic physicians' offices (e.g., centers, clinics)621111 Offices of Physicians (except Mental Health Specialists)$16 million in average annual receipts
Orthopedic plaster, gypsum, manufacturing327420 Gypsum Product Manufacturing1,500 employees
Orthopedic shoes (except extension shoes), children's, manufacturing316210 Footwear Manufacturing1,000 employees
Orthopedic shoes (except extension shoes), men's, manufacturing316210 Footwear Manufacturing1,000 employees
Orthopedic shoes (except extension shoes), women's, manufacturing316210 Footwear Manufacturing1,000 employees
Orthopedic shoes stores448210 Shoe Stores$30 million in average annual receipts
Orthopedic surgeons' offices (e.g., centers, clinics)621111 Offices of Physicians (except Mental Health Specialists)$16 million in average annual receipts
Orthotists' offices (e.g., centers, clinic)621399 Offices of All Other Miscellaneous Health Practitioners$10 million in average annual receipts
OSB (oriented strandboard) manufacturing321219 Reconstituted Wood Product Manufacturing750 employees
Oscillators (e.g., instrument type audiofrequency and radiofrequency) manufacturing334515 Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals750 employees
Oscilloscopes manufacturing334515 Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals750 employees
Osmium mining and/or beneficiating212299 All Other Metal Ore Mining750 employees
Osmometers manufacturing334516 Analytical Laboratory Instrument Manufacturing1,000 employees
Ossein manufacturing325998 All Other Miscellaneous Chemical Product and Preparation Manufacturing650 employees
Osteopathic hospitals622110 General Medical and Surgical Hospitals$47 million in average annual receipts
Osteopathic physicians' (except mental health) offices (e.g., centers, clinics)621111 Offices of Physicians (except Mental Health Specialists)$16 million in average annual receipts
Ostrich production112390 Other Poultry Production$3.8 million in average annual receipts
Otolaryngologists' offices (e.g., centers, clinics)621111 Offices of Physicians (except Mental Health Specialists)$16 million in average annual receipts
Otoscopes, electromedical, manufacturing334510 Electromedical and Electrotherapeutic Apparatus Manufacturing1,250 employees
Ottomans, upholstered, manufacturing337121 Upholstered Household Furniture Manufacturing1,000 employees
Out-of-home media (i.e., display) advertising services541850 Indoor and Outdoor Display Advertising$34.5 million in average annual receipts
Outboard motor dealers441222 Boat Dealers$40 million in average annual receipts
Outboard motor repair shops811490 Other Personal and Household Goods Repair and Maintenance$9 million in average annual receipts
Outboard motors manufacturing333618 Other Engine Equipment Manufacturing1,500 employees
Outboard motors merchant wholesalers423910 Sporting and Recreational Goods and Supplies Merchant Wholesalers100 employees
Outdoor adventure operations (e.g., white water rafting) without accommodations713990 All Other Amusement and Recreation Industries$9 million in average annual receipts
Outdoor adventure retreats with accommodation facilities721214 Recreational and Vacation Camps (except Campgrounds)$9 million in average annual receipts
Outdoor display advertising services541850 Indoor and Outdoor Display Advertising$34.5 million in average annual receipts
Outdoor furniture merchant wholesalers423210 Furniture Merchant Wholesalers100 employees
Outdoor recreation facility construction237990 Other Heavy and Civil Engineering Construction$45 million in average annual receipts
Outdoor sporting equipment stores451110 Sporting Goods Stores$23.5 million in average annual receipts
Outerwear handknitted for the trade315190 Other Apparel Knitting Mills750 employees
Outerwear, men's and boys', merchant wholesalers424320 Men's and Boys' Clothing and Furnishings Merchant Wholesalers150 employees
Outerwear, women's, children's, and infants', merchant wholesalers424330 Women's, Children's, and Infants' Clothing and Accessories Merchant Wholesalers100 employees
Outlet boxes, electrical wiring, manufacturing335932 Noncurrent-Carrying Wiring Device Manufacturing1,000 employees
Outlets (i.e., receptacles), electrical, manufacturing335931 Current-Carrying Wiring Device Manufacturing600 employees
Outlets, convenience, electrical, manufacturing335931 Current-Carrying Wiring Device Manufacturing600 employees
Outpatient mental health centers and clinics (except hospitals)621420 Outpatient Mental Health and Substance Abuse Centers$19 million in average annual receipts
Outpatient treatment centers and clinics (except hospitals) for substance abuse (i.e., alcoholism, drug addiction)621420 Outpatient Mental Health and Substance Abuse Centers$19 million in average annual receipts
Outpatient treatment centers and clinics for alcoholism621420 Outpatient Mental Health and Substance Abuse Centers$19 million in average annual receipts
Outpatient treatment centers and clinics for drug addiction621420 Outpatient Mental Health and Substance Abuse Centers$19 million in average annual receipts
Oven cleaners manufacturing325612 Polish and Other Sanitation Good Manufacturing900 employees
Oven temperature controls, nonindustrial, manufacturing334512 Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use650 employees
Oven, household-type, repair and maintenance services without retailing new ovens811412 Appliance Repair and Maintenance$19 million in average annual receipts
Oven, industrial plant, construction236210 Industrial Building Construction$45 million in average annual receipts
Ovens, bakery, manufacturing333241 Food Product Machinery Manufacturing500 employees
Ovens, commercial-type, manufacturing333318 Other Commercial and Service Industry Machinery Manufacturing1,000 employees
Ovens, commercial-type, merchant wholesalers423440 Other Commercial Equipment Merchant Wholesalers100 employees
Ovens, freestanding household-type, manufacturing335220 Major Household Appliance Manufacturing1,500 employees
Ovens, gas and electric, household-type, merchant wholesalers423620 Household Appliances, Electric Housewares, and Consumer Electronics Merchant Wholesalers225 employees
Ovens, industrial process and laboratory-type, manufacturing333994 Industrial Process Furnace and Oven Manufacturing500 employees
Ovens, industrial, merchant wholesalers423830 Industrial Machinery and Equipment Merchant Wholesalers100 employees
Ovens, portable household-type (except microwave and convection ovens), manufacturing335210 Small Electrical Appliance Manufacturing1,500 employees
Ovens, portable household-type convection and microwave, manufacturing335220 Major Household Appliance Manufacturing1,500 employees
Ovenware made from purchased glass327215 Glass Product Manufacturing Made of Purchased Glass1,000 employees
Ovenware, glass, made in glass making plants327212 Other Pressed and Blown Glass and Glassware Manufacturing1,250 employees
Overall jackets, work, cut and sew apparel contractors315210 Cut and Sew Apparel Contractors750 employees
Overall jackets, work, men's and boys', cut and sew apparel contractors315211 Men's and Boys' Cut and Sew Apparel ContractorsRetired code (NAICS 2007)—
Overall jackets, work, men's and boys', cut and sewn from purchased fabric (except apparel contractors)315220 Men's and Boys' Cut and Sew Apparel Manufacturing750 employees
Overalls, work, cut and sew apparel contractors315210 Cut and Sew Apparel Contractors750 employees
Overalls, work, men's and boys', cut and sew apparel contractors315211 Men's and Boys' Cut and Sew Apparel ContractorsRetired code (NAICS 2007)—
Overalls, work, men's and boys', cut and sewn from purchased fabric (except apparel contractors)315220 Men's and Boys' Cut and Sew Apparel Manufacturing750 employees
Overburden removal for coal mining on a contract basis213113 Support Activities for Coal Mining$27.5 million in average annual receipts
Overburden removal for metal mining on a contract basis213114 Support Activities for Metal Mining$41 million in average annual receipts
Overburden removal for nonmetallic minerals mining (except fuels) on a contract basis213115 Support Activities for Nonmetallic Minerals (except Fuels) Mining$20.5 million in average annual receipts
Overcoats cut and sew apparel contractors315210 Cut and Sew Apparel Contractors750 employees
Overcoats, men's and boys', cut and sew apparel contractors315211 Men's and Boys' Cut and Sew Apparel ContractorsRetired code (NAICS 2007)—
Overcoats, men's and boys', cut and sewn from purchased fabric (except apparel contractors)315220 Men's and Boys' Cut and Sew Apparel Manufacturing750 employees
Overcoats, women's and girls', cut and sewn from purchased fabric (except apparel contractors)315240 Women's, Girls', and Infants' Cut and Sew Apparel Manufacturing750 employees
Overcoats, women's, girls', and infants', cut and sew apparel contractors315212 Women's, Girls', and Infants' Cut and Sew Apparel ContractorsRetired code (NAICS 2007)—
Overcoats, women's, misses', and girls', cut and sewn from purchased fabric (except apparel contractors)315234 Women's and Girls' Cut and Sew Suit, Coat, Tailored Jacket, and Skirt ManufacturingRetired code (NAICS 2007)—
Overhead conveyors manufacturing333922 Conveyor and Conveying Equipment Manufacturing500 employees
Overhead door, commercial- or industrial-type, installation238290 Other Building Equipment Contractors$22 million in average annual receipts
Overhead door, residential-type, installation238350 Finish Carpentry Contractors$19 million in average annual receipts
Overhead projectors (except computer peripheral) manufacturing333316 Photographic and Photocopying Equipment Manufacturing1,000 employees
Overhead projectors, computer peripheral-type, manufacturing334118 Computer Terminal and Other Computer Peripheral Equipment Manufacturing1,000 employees
Overhead traveling cranes manufacturing333923 Overhead Traveling Crane, Hoist, and Monorail System Manufacturing1,250 employees
Overpass construction237310 Highway, Street, and Bridge Construction$45 million in average annual receipts
Overshoes, plastics or plastics soled fabric upper, manufacturing316210 Footwear Manufacturing1,000 employees
Overshoes, rubber, or rubber soled fabric, manufacturing316210 Footwear Manufacturing1,000 employees
Oxalates (e.g., ammonium oxalate, ethyl oxalate, sodium oxalate) manufacturing325199 All Other Basic Organic Chemical Manufacturing1,250 employees
Oxalic acid manufacturing325199 All Other Basic Organic Chemical Manufacturing1,250 employees
Oxygen equipment rental (i.e. home use)532283 Home Health Equipment Rental$41 million in average annual receipts
Oxygen manufacturing325120 Industrial Gas Manufacturing1,200 employees
Oxygen tents manufacturing339112 Surgical and Medical Instrument Manufacturing1,000 employees
Oyster dredging114112 Shellfish Fishing$14 million in average annual receipts
Oyster production, farm raising112512 Shellfish Farming$3.8 million in average annual receipts
Ozokerite mining and/or beneficiating212399 All Other Nonmetallic Mineral Mining500 employees
Ozone machines for water purification manufacturing333318 Other Commercial and Service Industry Machinery Manufacturing1,000 employees

Business activities are the U.S. Census Bureau's illustrative examples for each NAICS code, size standards the SBA's. An activity Census lists under a retired code and a code in use names only the code in use. Search NAICS codes

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