Business and Economics Library

SIC Codes
Complete list of SIC codes from the U.S Securities and Exchange Commission.

NAICS Codes
Complete list of NAICS codes from the U.S Census Bureau.

Hoover’s
Hoover’s Online — Includes company overview, history, products/operations on more than 18,500 public and private U.S. companies and international companies. Covers major industry trends, industry links, and IPO information.  Hoover’s allows you to look up a company and find their SIC and NAICS codes.  To do this click on the “Companies” tab at the top of the screen and the company’s name or ticker symbol and then click “Search”, once you have the company selected you can scroll down the page to the ‘Industry Information’ section to find both the SIC and NAICS codes.

Business and Company Resource Center (Gale)
Indexes public and private company data, including contact names, addresses and telephone numbers, total employees, sales volume and business descriptions. Covers more than 11,000 U.S. & international companies and 53 industries.  To find SIC and NAICS codes Click on “Business and Company Resource Center with PROMT and Investext Plus”, click on “Company”, and then enter the company’s name or ticker symbol, once you have selected your company scroll down the page to find a listing of SIC and NAICS codes for that company.