Business Directories

Use business directories to locate information on a specific company or to develop a list of potential competitors or customers.

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Arizona Daily Star 200
Annual listing of Southern Arizona's largest employers.
Arizona Republic 100
Arizona's largest public and privately held companies ranked by number of employees.

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Retail Industry Buying Guide
Start here for locating the tools needed to run a successful retail business.
Sweets Catalog
Specializes in products related to building and construction. From the McGraw-Hill Construction Network.
Thomas Register
Search 155,000 U.S. & Canadian companies to find the industrial products or services you need.

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European Business Directory
Covers over 500,000 businesses. Search by type of product or company name.
Includes statistical resources and company directories.
International directory covering over 1.7 million companies from over 60 countries. Registration required to search.
Thomas Global Register
Thomas Global Register is a directory of more than 500,000 manufacturers and distributors from 22 countries.

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Library Resources

Quality resources you can't find anywhere else on the web, free with your library card.

Don't have a card? Search using your zip code.


  • ReferenceUSA — Business and consumer research tool. Create marketing plans, conduct competitive analysis, and locate people. Directory of U.S. businesses and residences that can be used to create lists and research companies.
  • Business Source Premier Comprehensive business coverage includes company profiles, financial data, investment research, industry reports, and more.
  • Business Plans Handbook (eBook) — Collection of business plans.
  • Regional Business News — Full-text articles for more than 80 regional business publications.

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Pima County Website