All States/

Washington Business Entity Search

Search Washington LLCs, corporations, and partnerships via API. Structured JSON from IRS Exempt Organizations Business Master File. 338,920 entities available.

338,920
Total Entities
106,727
Corporations
96,665
LLCs
68,168
Sole Proprietorships

Search Washington entities

Entity types in Washington

Corporation
106,727LLC
96,665Sole Proprietorship
68,168Nonprofit
42,000FCC Licensee
10,549Non-Profit
7,317Partnership
2,493Business Entity
2,369LLP
1,529Professional Association
1,103

Related Guides

How to Look Up a Business in Any StateHow to Verify if a Business is Legitimate

Get Washington business data via API

Developer plan includes a 14-day free trial. Cancel anytime.

Start Free Trial
Washington Business Entity Search API — Filed.dev