Illinois business license lookup & entity search
The official places to search registered businesses and verify licenses in Illinois. Entity records live with the Illinois Secretary of State Business Entity Search; license verification runs through the licensing agencies below. We link to the official portals only, so what you see is the state's own record.
Statewide general business license in Illinois:Not required. Full requirements, agency, and renewal timing in the Illinois business license guide.
Official Illinois lookups
Business entity search
Illinois Secretary of State Business Entity Search
Corporations and LLCs with status, agent, and annual report dates.
Open the official entity search ↗License verification
IDFPR license lookup
Professional licenses regulated by Financial and Professional Regulation.
Open the official lookup ↗How to verify a Illinois business end to end
- Search the exact legal name (or registration number) in the entity search and confirm the status shows active or in good standing.
- Match the registered name against the name on the contract or invoice; a different trade name should trace back to the same registered entity.
- Verify any trade or professional license in the licensing agency's own lookup, including status and expiration, not just that a number exists.
- For storefront or location-based work, confirm the local business license with the city or county clerk; it will not appear in statewide searches.
Getting licensed in Illinois yourself?
Illinois license requirements
What Illinois actually requires: registrations, permits, agencies, and renewals.
Apply in Illinois
Hand the mapping and filings to our licensing team and start the application.
Do I need a license?
A short assessment that turns your footprint into a personalized checklist.
Nearby in the directory: Idaho · Indiana · Louisiana · All states
Registry links point to official government portals and open in a new tab. Portals occasionally move; if a link lands on the agency's home page, use its search or licensing menu. Informational, not legal advice.