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Business Research Guide: Finding Web Sites

A research guide covering all business-related topics, including accounting, economics, finance, marketing, and management.

SIC and NAICS Codes

Start your business or industry research here FIRST!

To use many information sources, you must know the industry classification codes for the industry or company you want to research. Do you know your SIC and NAICS codes? If not, click here for NAICS codes.  (HINT:  It's pronounced "NAKES" codes)

What Are Industry Codes and How Do I Find Them?

What is an industry code?

An industry code is a number that represents an industry or type of business. These codes were developed by the U.S. government to make it easier to group businesses into categories called "industries," and to collect information about those industries.

Until 1997, the government used the Standard Industrial Classification system (often called "SIC"). SIC codes are four-digit numbers. The government now uses a system called North American Industrial Classification System ("NAICS"). NAICS codes are five- or six-digit numbers.

For example, the SIC code for the ice cream manufacturing industry is "2024." The NAICS code for the same industry is "311520."

Why do I need to know the SIC and NAICS codes for my industry?

Many business information sources are arranged by SIC or NAICS codes, so it's helpful to know your code(s) to find the information you need.

Searching with Google

Google Seach Tips:

  • generally, Google should be the LAST thing you search (try Library sources first)
  • use quotations for phrase searching
  • -site:.com added to your search will eliminate ALL .com sites in search results
  • site:.edu (or site:.gov) will ONLY search within the designated domain

Recommended Websites

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