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Illinois DBA Search
Look up a DBA (doing business as) in Illinois — also called a fictitious business name, assumed name, or trade name. Below are the official Illinois search routes. To see the owner, status, and USDOT / OFAC behind a name, run a full verification.
Illinois files DBAs by county — 14 listed
Pick the county where the business operates to open its clerk's fictitious-name search.
Lake County, IL
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Champaign County, IL
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Cook County, IL (Chicago)
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DuPage County, IL
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Kane County, IL
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Madison County, IL
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McHenry County, IL
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Peoria County, IL
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Rock Island County, IL
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Sangamon County, IL (Springfield)
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St. Clair County, IL
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Tazewell County, IL
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Will County, IL
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Winnebago County, IL (Rockford)
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A DBA isn't a legal entity. It's a trade name a person or company registers to operate
under — it doesn't tell you who actually owns the business. For credit and underwriting, pair the DBA with
the registered entity and its officers. Run a full verification →