Here are two ways to find SIC and NAICS Codes:
Option 1. Search the official government SIC and NAICS manuals online to locate codes and industry descriptions.
Option 2. Locate a company profile for a company that operates within the industry you are researching. Company profiles typically include the company's SIC and NAICS codes. Many companies operate across a variety of industries (e.g. have multiple lines of business) and may have more than one code. A company's primary SIC/NAICS code is usually the first in the listing. These library databases provide company profiles: