Illinois DBA (Doing Business As) Guide (2026)
In Illinois, sole proprietors and general partnerships file an Assumed Business Name with the County Clerk in the county of the principal place of business (805 ILCS 405). After filing you must publish notice in a newspaper for three consecutive weeks. Fees vary by county from $5-$50.
The one thing to knowAfter filing you must publish notice in a newspaper of general circulation for three consecutive weeks and file the certificate of publication with the County Clerk.
The process
- File in the right county
File with the County Clerk in the county of your principal place of business (805 ILCS 405).
- Pay the fee
Fees vary by county, from $5-$50.
- Publish for three weeks
Publish notice in a newspaper of general circulation for three consecutive weeks.
- File the certificate of publication
File the certificate of publication with the County Clerk.
DBA filing by county — all 102 Illinois counties
| County | Fee |
|---|---|
| Adams County | $5–$50 (call to confirm) |
| Alexander County | $5–$50 (call to confirm) |
| Bond County | $5–$50 (call to confirm) |
| Boone County | $5–$50 (call to confirm) |
| Brown County | $5–$50 (call to confirm) |
| Bureau County | $5–$50 (call to confirm) |
| Calhoun County | $5–$50 (call to confirm) |
| Carroll County | $5–$50 (call to confirm) |
| Cass County | $5–$50 (call to confirm) |
| Champaign County | $5–$50 (call to confirm) |
| Christian County | $5–$50 (call to confirm) |
| Clark County | $5–$50 (call to confirm) |
| Clay County | $5–$50 (call to confirm) |
| Clinton County | $5–$50 (call to confirm) |
| Coles County | $5–$50 (call to confirm) |
| Cook County | $5–$50 (call to confirm) |
| Crawford County | $5–$50 (call to confirm) |
| Cumberland County | $5–$50 (call to confirm) |
| De Witt County | $5–$50 (call to confirm) |
| DeKalb County | $5–$50 (call to confirm) |
| Douglas County | $5–$50 (call to confirm) |
| DuPage County | $5–$50 (call to confirm) |
| Edgar County | $5–$50 (call to confirm) |
| Edwards County | $5–$50 (call to confirm) |
| Effingham County | $5–$50 (call to confirm) |
| Fayette County | $5–$50 (call to confirm) |
| Ford County | $5–$50 (call to confirm) |
| Franklin County | $5–$50 (call to confirm) |
| Fulton County | $5–$50 (call to confirm) |
| Gallatin County | $5–$50 (call to confirm) |
| Greene County | $5–$50 (call to confirm) |
| Grundy County | $5–$50 (call to confirm) |
| Hamilton County | $5–$50 (call to confirm) |
| Hancock County | $5–$50 (call to confirm) |
| Hardin County | $5–$50 (call to confirm) |
| Henderson County | $5–$50 (call to confirm) |
| Henry County | $5–$50 (call to confirm) |
| Iroquois County | $5–$50 (call to confirm) |
| Jackson County | $5–$50 (call to confirm) |
| Jasper County | $5–$50 (call to confirm) |
| Jefferson County | $5–$50 (call to confirm) |
| Jersey County | $5–$50 (call to confirm) |
| Jo Daviess County | $5–$50 (call to confirm) |
| Johnson County | $5–$50 (call to confirm) |
| Kane County | $5–$50 (call to confirm) |
| Kankakee County | $5–$50 (call to confirm) |
| Kendall County | $5–$50 (call to confirm) |
| Knox County | $5–$50 (call to confirm) |
| Lake County | $5–$50 (call to confirm) |
| LaSalle County | $5–$50 (call to confirm) |
| Lawrence County | $5–$50 (call to confirm) |
| Lee County | $5–$50 (call to confirm) |
| Livingston County | $5–$50 (call to confirm) |
| Logan County | $5–$50 (call to confirm) |
| Macon County | $5–$50 (call to confirm) |
| Macoupin County | $5–$50 (call to confirm) |
| Madison County | $5–$50 (call to confirm) |
| Marion County | $5–$50 (call to confirm) |
| Marshall County | $5–$50 (call to confirm) |
| Mason County | $5–$50 (call to confirm) |
| Massac County | $5–$50 (call to confirm) |
| McDonough County | $5–$50 (call to confirm) |
| McHenry County | $5–$50 (call to confirm) |
| McLean County | $5–$50 (call to confirm) |
| Menard County | $5–$50 (call to confirm) |
| Mercer County | $5–$50 (call to confirm) |
| Monroe County | $5–$50 (call to confirm) |
| Montgomery County | $5–$50 (call to confirm) |
| Morgan County | $5–$50 (call to confirm) |
| Moultrie County | $5–$50 (call to confirm) |
| Ogle County | $5–$50 (call to confirm) |
| Peoria County | $5–$50 (call to confirm) |
| Perry County | $5–$50 (call to confirm) |
| Piatt County | $5–$50 (call to confirm) |
| Pike County | $5–$50 (call to confirm) |
| Pope County | $5–$50 (call to confirm) |
| Pulaski County | $5–$50 (call to confirm) |
| Putnam County | $5–$50 (call to confirm) |
| Randolph County | $5–$50 (call to confirm) |
| Richland County | $5–$50 (call to confirm) |
| Rock Island County | $5–$50 (call to confirm) |
| Saline County | $5–$50 (call to confirm) |
| Sangamon County | $5–$50 (call to confirm) |
| Schuyler County | $5–$50 (call to confirm) |
| Scott County | $5–$50 (call to confirm) |
| Shelby County | $5–$50 (call to confirm) |
| St. Clair County | $5–$50 (call to confirm) |
| Stark County | $5–$50 (call to confirm) |
| Stephenson County | $5–$50 (call to confirm) |
| Tazewell County | $5–$50 (call to confirm) |
| Union County | $5–$50 (call to confirm) |
| Vermilion County | $5–$50 (call to confirm) |
| Wabash County | $5–$50 (call to confirm) |
| Warren County | $5–$50 (call to confirm) |
| Washington County | $5–$50 (call to confirm) |
| Wayne County | $5–$50 (call to confirm) |
| White County | $5–$50 (call to confirm) |
| Whiteside County | $5–$50 (call to confirm) |
| Will County | $5–$50 (call to confirm) |
| Williamson County | $5–$50 (call to confirm) |
| Winnebago County | $5–$50 (call to confirm) |
| Woodford County | $5–$50 (call to confirm) |
Illinois-specific details
LLCs and corporations don't file with the county -- they file an assumed name with the Illinois Secretary of State.
What to bring
- Your assumed business name
- Your principal place of business address
- Owner information
- The filing fee ($5-$50, varies by county)
- A plan for newspaper publication (three consecutive weeks)
Frequently asked questions
What is a DBA called in Illinois?
An Assumed Business Name, filed with the County Clerk (805 ILCS 405).
Who files with the county?
Sole proprietors and general partnerships, in the county of the principal place of business.
Is publication required?
Yes. Publish notice in a newspaper of general circulation for three consecutive weeks, then file the certificate of publication with the County Clerk.
How much does it cost?
Fees vary by county, from $5-$50.
What about LLCs and corporations?
They file an assumed name with the Illinois Secretary of State instead of the county.