Standard Industrial Classification Codes (SIC Codes)
Standard Industrial Classification (SIC) codes are four-digit codes used to classify economic activity in a hierarchical code structure by division, major group, and specific industry. An eight-digit version of these codes is also used by private industry for certain information, such as business demographic data.
Search by SIC Code or keyword to find a 4-digit or 8-digit industry code.
The SIC code structure was last revised in 1987 and is gradually being phased out in favor of the six-digit North American Industry Classification System; however certain government departments and agencies, such as the U.S. Securities and Exchange Commission (SEC), still use the SIC codes.
North American Industry Classification System (NAICS Codes)
The North American Industry Classification System uses six-digit codes to classify economic activities into twenty industry sectors, with the six-digit hierarchical code structure allowing greater classification flexibility than the four-digit structure of the Standard Industrial Classification Codes (SIC Codes).