- Williamson County, Illinois Home Page
County Inforeport
General information about Williamson County
Population: 63,094
Area: 424 sq. miles
County Seat: Marion
Area Code(s): 618
Time Zone: Central
- Illinois Court Records and other Resources
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Links to state and local court records, general Illinois court information, directory of courts, and online resources for courts in Illinois.
- Court Directory and Court Records Info
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Directory of court locations in Williamson County, Illinois. Includes local links to searching court records, dockets, legal research, self help, and more.
- Assessor
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Williamson County Supervisor of Assessments Office
Williamson County Courthouse
200 West Jefferson St., Marion, IL 62959
Phone (618)997-1301 Ext.142
- Clerk, Recorder, Marriage Licenses, Birth, Death and Marriage Records and Voter Information
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Williamson County Clerk and Recorder
Williamson County Courthouse
200 West Jefferson St., Marion, IL 62959
Phone (618)997-1301 Ext. 120, 121, 122 or 123
- Williamson County census information summary
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Williamson County statistics for population, ethnicity, housing, geography and businesses. From the U.S. Census Bureau.
- Sheriff Press Releases
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View Williamson County Sheriff press releases by date.
- Crime Reports
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View Williamson County Sheriff information about obtaining crime reports.
- Department Directory
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View Williamson County department directory.
- Delinquent Taxes and Tax Sales
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Williamson County Treasurer
Williamson County Courthouse
200 West Jefferson St., Marion, IL 62959
Phone (618)997-1301 Ext. 160
- Tax Deed Auctions
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View Williamson County tax deed auctions, including results of prior sales.
- Genealogy Records
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Search Williamson County genealogy records such as cemeteries, census records, burials, and more.
Sheriff and Jail
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Williamson County Sheriff's Office
200 West Jefferson St., Marion, IL 62959
Phone (618)997-6541 Fax (618)997-3405
- Inmate Records
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Search Illinois Department of Corrections inmate records.
- Government Jobs
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Search Illinois state government jobs by category, agency or keyword.
- Marriage Licenses and Birth, Death and Marriage Records
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View Williamson County information about obtaining marriage licenses and birth, death and marriage certificates.
- Sex Offender Records
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Search Williamson County sex offender records.
- Sex Offenders
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Search Williamson County registered sex offenders by address including email alerts.
- Floodplain Maps
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Search Williamson County floodplain maps by address.
- Meeting Minutes
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View Williamson County Board meeting minutes by date.
- Voter and Election Information
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View Williamson County voter and election information.
- Polling Locations
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View Williamson County polling locations.
- Election Results
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View Williamson County election results.
- Most Wanted Persons
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View Williamson County Sheriff weekly most wanted persons.
