FAQ Category: Common NAICS Questions

Yes! Just Use Either of the Resources Below: ac NAICS to SIC Crosswalk PDF Download

We have both hard copy and electronic manuals available: The NAICS Manual is the official hard copy reference containing all the NAICS codes, descriptions, and cross-references. It is the easy “desk-reference” for everything NAICS. You can also find downloadable reference files here.

Title 13, U.S. Code, Section 9 (a) prohibits the U.S. Census Bureau from disclosing individual company activities including NAICS and SIC codes. The Census Bureau is bound by Title 13 of the United States Code. These laws not only provide authority for the work the census does, but also provides strong protection for the information … Read more

The U.S. Census Bureau assigns and maintains only one NAICS code for each establishment based on its primary activity (generally the activity that generates the most revenue for the establishment). Since other federal government agencies, trade associations, and regulation boards maintain their own lists of business establishments and assign classification codes based on their own … Read more

NAICS will be reviewed every five years (in the years ending in ‘2’ or ‘7’) for potential revisions so that the classification system can keep pace with the changing economy. The Office of Management and Budget (OMB), through its Economic Classification Policy Committee (ECPC), will solicit public comments through a notice published in the Federal … Read more

Industries in the United States are identified by a six-digit code. Each manufacturing and mining product or service is identified by a ten-digit product code. The product coding structure represents an extension, by the U.S. Bureau of the Census, of the six-digit industry classification of the manufacturing and mining sectors. The product classification system operates … Read more

NAICS is a two-through-six-digit hierarchical classification code system, offering five levels of detail. Each digit in the code is part of a series of progressively narrower categories, and the more digits in the code signify greater classification detail. The first two digits designate the economic sector, the third digit designates the subsector, the fourth digit … Read more

You can obtain data for a specific NAICS industry by going to the 2007 Economic Census website. This website provides data at the sector level. You may also get data by state, or selected metro area by using the pull-down menus in the upper right hand corner of the page. You may also obtain data … Read more

The Small Business Administration (SBA) developed size standards for each NAICS category. To find more information about the SBA size standards, click here. You may also contact SBA’s Office of Size Standards at 202-205-6618 or via email to [email protected]

The U.S. Census Bureau is unable to provide a NAICS or SIC code for a named business over the Internet or telephone without written request. Luckily, we at the NAICS Association can provide statistical information for specific companies with this simple company lookup tool.