Williamson County GIS Portal (Illinois)

Search for Williamson County, IL GIS maps. A GIS map search can provide information like county maps, town maps, city maps, local maps, property maps, parcel maps, plat maps, public property, property tax assessments, flood zones, zoning boundaries, geographic information, historical maps, and property tax information.


Williamson County Assessor Offices are charged with determining the value of taxable property in their county or local area in order to calculate Williamson County property taxes. In addition to property values, Assessors maintain detailed county and local maps, including Geographic Information Science (GIS) maps. These Williamson County GIS maps can show public property, parks, property divisions, and roads, as well as property assessments and property taxes in Williamson County, Illinois. These maps can also include place names, bodies of water, flood zones, property zones, and other geographic information. Some Assessors may keep historic GIS maps that include historic property tax assessments. These maps may be available on the Williamson County Assessor Office website.

Williamson County Assessor's Office Marion IL 200 West Jefferson Street 62959 618-997-1301


Williamson County Town and City Halls provide municipal services for their town or city, including preserving vital records and maintaining records on their jurisdiction such as Williamson County GIS maps. The GIS maps at a Williamson County Town or City Hall can include property boundaries, public property, unclaimed parcels, and roads, as well as appraisal values for properties and property tax assessments in Williamson County, Illinois. These GIS maps may also show population information, place names, zoning boundaries, bodies of water, flood zones, and other geographic information. Some Town and City Halls also have historical maps of their area. These maps are often available to the public on the Williamson County Town and City Hall website.

Cambria City Hall Carterville IL 302 South Richart Street 62918 618-985-6082

Creal Springs City Hall Creal Springs IL 507 North Walnut Grove Road 62922 618-996-2311

Hurst City Hall Hurst IL 111 Bush Avenue 62949 618-987-2513

Johnston City Hall Johnston IL 100 West Broadway Boulevard 62951 618-983-6651

Pittsburg City Hall Pittsburg IL 302 W Avery Ave 62974 618-993-8260


Williamson County Clerk Offices maintain public records for a county or local government, which includes GIS maps. These maps provide detailed information on the area, including Williamson County property maps that show boundaries, public property, property divisions, and in some cases, population information in Williamson County, Illinois. They may also include property value assessments and property tax rates. Williamson County GIS maps can show place names, bodies of water, zoning information, flood zones, and other geographic information. Clerks may also have historic GIS maps from the USGS or other organizations, and these maps are often available online through the Clerk Office website.

Carterville City Clerk Carterville IL 101 South Division Street 62918 618-985-2252

Herrin City Clerk Herrin IL 300 North Park Avenue 62948 618-942-3175

Williamson County Clerk Marion IL 407 North Monroe Street 62959 618-997-1301


Williamson County Recorders of Deeds keep real estate records to ensure the accuracy of property and land records. In addition to deeds, Recorders of Deeds also have detailed county and local maps, including Williamson County GIS maps that show property lines, building information, public property, unclaimed parcels, as well as property value assessments and property tax information. These GIS maps may also include place names, zoning boundaries, bodies of water, flood zones, and other geographic information in Williamson County, Illinois. The Recorder of Deeds may also have historic GIS maps. These maps are often available on the Williamson County Recorder of Deeds website.

Williamson County Recorder of Deeds Marion IL 407 North Monroe Street 62959 618-997-1301