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North American Industry Classification System (NAICS)

NAICS is the U.S. government's official system for classifying business activities by industry sector. NAICS was created by the U.S. Office of Management and Budget in 1997, in conjunction with the governments of Canada and Mexico. It is used by government agencies, private industry, and researchers to tabulate economic statistics, categorize companies by type of business, organize published information about industries, and other reporting purposes.

Anyone conducted research about U.S. industries (or companies within those industries) will benefit from using the standardized six-digit NAICS codes in their search. For example, the NAICS code for the computer manufacturing industry is 334111; the code for fast-food restaurants, pizzerias, and delicatessens is 722513. Many of the business databases offered by the University Libraries utilize the NAICS reporting structure and are searchable by NAICS codes.

The NAICS system is revised every five years, in years ending in 2 or 7. The latest edition is 2012. NAICS replaces the government's former numbering system, called the Standard Industrial Classification (SIC).

For more information about NAICS, including a keyword-searchable guide to the codes, detailed definitions of each industry sector, and a downloadable manual of the complete code structure, go to

The following outline summaries the basic structure of NAICS numbering at the two-digit level.

Outline of Two-Digit NAICS Industry Sectors

SectorIndustry Title
11 Agriculture, Forestry, Fishing and Hunting
21 Mining, Quarrying, Oil and Gas Extraction
22 Utilities
23 Construction
31-33 Manufacturing
42 Wholesale Trade
44-45 Retail Trade
48-49 Transportation and Warehousing
51 Information
52 Finance and Insurance
53 Real Estate and Rental and Leasing
54 Professional, Scientific and Technical Services
55 Management of Companies and Enterprises
56 Administrative and Support; Waste Management
61 Educational Services
62 Health Care and Social Assistance
71 Arts, Entertainment and Recreation
72 Accommodation and Food Services
81 Other Services (except Public Administration)
92 Public Administration

Example of Three-Digit NAICS Detail for the Manufacturing Sector (Groups 31 through 33)

Beverages and Tobacco

NAICS IndustryTitle Code
311 Food Manufacturing
313 Textile Mills
314 Textile Products
315 Apparel
316 Leather and Footwear
321 Wood Products
322 Paper
323 Printing
324 Petroleum
325 Chemicals
326 Plastics and Rubber
327 Nonmetallic Mineral Products (e.g., glass, concrete)
331 Primary Metals
332 Fabricated Metals
333 Machinery
334 Computers and Electronics
335 Electrical Equipment and Appliances
336 Transportation Equipment (motor vehicles, airplanes, ships)
337 Furniture and Related Products
339 Miscellaneous Manufactured Products