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County Government | Williamson County Offices
407 North Monroe Street, Marion, IL 62959
Eligibility
Open to anyone
Required documents
Call for information
Hours
Mon-Fri 8 am-4 pm
(618) 997-1301
Voice·
Main Phone
(618) 998-2110
Voice·
Alternate Number
Application process
Call for services
Fees
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Service area
Williamson County, IL
County government departments and other county information.
Date of Last Formal Update
07/17/2025
Data provided by
United Way of the Midlands
What's Here
Providing organization
Williamson County Offices
County services.