Register a Business Name in Boone County, IL
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Here's what to expect at the County Clerk — fees, what to bring, and where to go.
In Illinois, a DBA is an Assumed Business Name. Sole proprietors and general partnerships file with the County Clerk— this office — in the county of the business's principal place of business (Assumed Business Name Act, 805 ILCS 405). The fee varies by county, typically $5–$50 — call to confirm.
After filing, you must publish notice in a newspaper of general circulation in Boone County once a week for three consecutive weeks, then file the certificate of publication with the County Clerk. The filing is not complete without it.
An LLC or corporation using a different name files an assumed name with the Illinois Secretary of State, not the county.
805 ILCS 405/1: "The certificate shall be executed and duly acknowledged by the person or persons so conducting or intending to conduct the business."
Source: 805 ILCS 405/1 ↗ — “The certificate shall be executed and duly acknowledged by the person or persons so conducting or intending to conduct the business.” (as of 26 September 2026)
Boone County has its own Assumed Business Name (DBA) Application. Illinois has one Assumed Business Name Act (805 ILCS 405), so this shows you exactly what you will be asked for. But each county clerk issues its own application, and yours may not accept a copy from another county.
This page shows the best information we have for Boone County. Fees and hours may vary — call ahead to confirm before visiting.
Filing a DBA somewhere else in Illinois? See the Illinois DBA guide for statewide requirements and fees.