When visiting the county assessor's office, bring your property's parcel number or street address to quickly locate your assessment record, and bring supporting documentation if you are disputing a valuation. Williamson County Assessor's Office is located at 200 West Jefferson Street, Marion, IL. Many assessor offices also maintain online portals where you can review your assessed value and exemption status before visiting in person.
Williamson County Assessor's Office Contact Information
Address, Phone Number, and Hours for an Assessor in Williamson County, Illinois.
| Name | Williamson County Assessor's Office |
| Address | 200 West Jefferson Street, Marion IL 62959 Map |
| Phone | (618) 997-1301 |
| Website | |
| Hours |
Map of Williamson County Assessor's Office
Assessor in near by County
About Williamson County Assessor's Office
The Williamson County Assessor's Office, located in Marion, Illinois, determines the value of all taxable property in Williamson County, IL. Taxable property includes land and commercial properties, often referred to as real property or real estate, and fixed assets owned by businesses, often referred to as personal property. Property assessments performed by the Assessor are used to determine the Williamson County property taxes owed by individual taxpayers.
- Property assessment values and annual reassessment notices for parcels in Williamson County Assessor's Office's jurisdiction
- Homestead, senior citizen, veteran, and disability exemption applications
- Formal assessment appeals and informal review requests
- GIS parcel maps, property boundary data, and ownership record corrections