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Procurement & Acquisitions Management @ Webster University Libraries

What are NAICS industry codes?

Table showing the 2022 two-digit NAICS industry sector (broad categories) codes.

NAICS (rhymes with snakes), is the North American Industry Classification System.  It is a 6-digit, hierarchical code that is used to classify "lines of business" for establishments for the purpose of collecting, analyzing, and publishing statistical data.  NAICS codes are replacing the Standard Industrial Classification (SIC) system.

Many of the Library's company and industry databases allow you to search by NAICS or SIC code or by keyword and may allow you to browse by industry codes. 

See the NAICS Main Page, which includes a browseable hierarchy/structure of codes and a keyword search.

This graphic shows the 2022 two-digit NAICS industry sector (broad categories) codes. For example:

Sector 11 is Agriculture, Forestry, Fishing and Hunting

Sectors 31 to 33 are Manufacturing

Sectors 44 and 45 are Retail Trade

Sector 92 in Public Administration


Industry report databases

Industry ratios/averages databases

These databases provide aggregated financial ratios for companies in an industry.  They do not provide ratios for individual companies. For company ratios, see What are financial ratios on the financials/investments page