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National Classifications

North American Industry Classification System

Country / Area: United States of America

Classification category: Activity classifications

General information
1 (a)Name of the current national classification (full name in official national languages and in English with acronyms in brackets, should be given)North American Industry Classification System (NAICS)
1 (b)In which language(s) is the classification available?The U.S. NAICS is in English only. The Canadian NAICS, with Canadian 6-digit detail, is available in English and French. Mexico’s national version of NAICS is available in Spanish.
1 (c)Can the classification (or information about it) be accessed on the Internet? If yes, please provide the URL.http://www.census.gov/eos/www/naics/
Classification structure
2 (a)Please describe the structure of the classification: How many levels does the classification have? (Please provide labels, such as “Division”, “Class”) How many categories exist at each level?20 Sectors (2-digit); 99 Subsectors (3-digit); 312 Industry Groups (4 digit); 713 NAICS Industries with 3-Country Agreement (5-digit); 1,065 U.S. NAICS Industries (6-digit)
2 (b)Please provide examples of the coding system used at each level.Sector: 72 - Accommodation and Food Services; 81 – Other Services (except Public Administration)
Subsector :721 – Accommodation; 811 – Repair and Maintenance
Industry Group: 7211 - Traveler Accommodation: 8111 – Automotive Repair and Maintenance
Industry: 72111 - Hotels (except Casino Hotels) and Motels; 81111 – Automotive Mechanical and Electrical Repair and Maintenance
U.S. Industry: 721110 - Hotels (except Casino Hotels) and Motels; 811111 – General Automotive Repair
Relationship to international standards
3 (a)Is this classification based on (or linked to) an international standard classification? If yes, please describe.NAICS is linked to the International Standard Industrial Classification of all Economic Activities (ISIC) (Rev 4) at many levels. Complete concordances are available at:
3 (b)Is the classification structure identical to the international standard or, if not, how does it differ? (e.g. have additional levels been added to the international standard or have changes been made within the level of the international structure, such as aggregations or additional breakdowns)
20 sectors (2-digit)17 Sections (A thru Q)
99 Subsectors (3-digit)60 Divisions (2-digit)
312 Industry Groups (4 digit)159 Groups (3-digit)
713 NAICS Industries (5-digit) 3-Country Agreement292 Classes (4-digit)
1,065 U.S. Industries (6-digit) (No 3-Country Agreements)-
3 (c)Please describe deviations from the international standard (in terms of structure, methodology or application rules). Please use examples, if a general statement is not possible.There are differences between the NAICS and ISIC classification schemes. Most important, perhaps, is the single (production process) conceptual framework of NAICS.
3 (d)At what level of the international standard can data be reported for international comparison? (Please provide examples of programmes / indicators if reporting takes place at different levels of the classification.)Tables linking 6-digit U.S. NAICS industry to parent 4-digit ISIC Class are used to convert U.S. annual data from NAICS to ISIC so that the U.N. can publish its data.
3 (e)If no links to international classifications exist or no international standard is used, please state if there are plans to use international norms in the future. 
Classification uses
4 (a)Please state for which statistical purposes (surveys etc.) this classification is used and if there are users outside of the Statistical Office. Please indicate at which level the classification is used for data collection and for data publishing.Statistical agencies such as the Census Bureau and Bureau of Labor Statistics use NAICS for the collection, tabulation, and publication of economic statistics. In both agencies, the universe files of business establishments are on a NAICS basis. The Bureau of Economic Analysis uses NAICS-based data in developing the national input-output tables, and for calculation of the GDP. Other U.S. statistical agencies such as the Internal Revenue Service, Statistics of Income Division have implemented NAICS. Major statistical products including economic surveys and censuses, employment surveys, producer price indices, and the national accounts publish data using the NAICS classification at varying levels of detail.
4 (b)Please give the names of institutions that use the classification for non-statistical purposes (as opposed to statistical purposes in question 4(a)). Also indicate the kind of use (e.g. tax offices, social security, customs, enterprise register, employment services, work permits etc.)The Internal Revenue Service (IRS, tax offices), Social Security Administration (SSA, social security), Environmental Protection Agency (EPA, regulatory), Small Business Administration (SBA, Government procurement and business loans), General Services Administration (contracts). Sorting and organizing vendor files or business dealings using the NAICS code is a typical use.
4 (c)Please indicate if alternative classifications are used by other institutions of the economy. Are these classifications available and useful for the Statistical Office?No.
Implementation / revision status
5 (a)Please state the date of the official adoption of the classification. If not yet adopted, please indicate the current state (e.g. in development, sent for approval, in printing, ready to be distributed etc.)January 7, 1997
5 (b)Please state the date of use of the classification for individual statistical programmes.The Census Bureau started using NAICS in the 1997 Economic Census. Other U.S. statistical agencies implemented NAICS on varying schedules through 2004.
5 (c)Are there existing plans for revision or update of the current classification?NAICS is reviewed for possible change each five years, in years ending with 2 and 7. Since adopted, NAICS incorporated revisions for 2002, 2007, and 2012.
5 (d)Name of former (previous) national classification (full name in both national tongue and in English with acronyms in brackets, should be given)1987 Standard Industrial Classification (SIC)
5 (e)Please describe the link of the former classification to international classificationsSIC to ISIC is available both electronically and in the International Concordances, which also includes NACE.
5 (f)Please describe the structure of the former classification and indicate the number of items at each level of the classification. (similar to question 2(a))11 Divisions (A through K) ; 83 Major Groups (2-digit); 416 Industry Groups (3-digit); 1,005 Industries (4-digit)
5 (g)Do conversion tables exist between the former and current classification?SIC to NAICS conversions are found in the back of the 1997 NAICS Manual and on this Internet site: http://www.census.gov/naics; and on the NAICS CD-ROM.
5 (h)When was the former classification implemented?1987
5 (i)Are statistical data still collected or published according to the former classification? Please indicate if this statistical data is collected or published by the Statistical Office or elsewhere.No.
Supporting documents
6 (a)Have national explanatory notes and/or guidelines been elaborated?National explanatory notes are prepared and published for each revision of NAICS.
6 (b)Do correspondence tables exist between the national and the international classifications (if applicable)?Tables linking 6-digit U.S. NAICS industry to parent 4-digit ISIC Class are available.
6 (c)Are correspondence tables between alternative and current classification available (if applicable)?1987 SIC to 1997 NAICS conversions are found in the back of the 1997 NAICS Manual, on http://www.census.gov/naics, and on the 1997 NAICS CD-ROM.
6 (d)Does a national coding index exist?Yes
6 (e)Is the classification available in electronic form? If yes, in which formats is it available?(e.g. PDF, TXT, Excel, XML)Yes, PDF
6 (f)Are the correspondence tables or indexes available in electronic form?Yes, Excel
Contact information
7 (a)Name of institution / office responsible for the development and maintenance of the classificationThe Economic Classification Policy Committee (ECPC)
Office of Management and Budget-Office of Statistical and Science Policy
7 (b)Contact address, phone number, e-mail or website for public information and inquiryDR. NAICS (www.census.gov/naics or dial 1-888-756-2427).
Other comments
9 (a)Please provide any other information on this classification that you consider relevant 

Source: UN questionnaire, 9/12/2012