Illinois · FIPS 17025 · County seat: Louisville
Clay County, IL GIS & Parcel Viewer
Looking for lot lines or a parcel number in Clay County, IL? The quickest route is the Clay County ArcGIS parcel map, the county parcel map we keep on file for this county. We link straight to it and add a few tips for getting around.
Open the Clay County parcel map ↗
Opens experience.arcgis.com in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | Clay County ArcGIS parcel map |
|---|---|
| Type | County-run map |
| Website | experience.arcgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Louisville |
| Population | 12,999 (2023 Census Bureau estimate) |
| Land area | 468 sq mi |
| FIPS code | 17025 |
About the official source
Clay County runs this viewer (directly or through a contracted vendor), which makes it the closest thing to the source for local parcel lines. When we tested the link in October 2026 it opened with no login and no fee.
Finding a property on this map
- Press the button above; an ArcGIS Experience Builder app opens in a new tab. Accept any splash or disclaimer screen.
- Search by address or parcel ID, or pan to the area.
- Select a parcel to view the information the publisher makes available.
- Explore the app's panels for layers, legends or printing.
If an address search comes up empty, try the parcel number from a tax bill or deed instead, or click the lot on the map.
About Clay County
The U.S. Census Bureau estimated Clay County's population at 12,999 in 2023, spread over about 468 square miles of land, or roughly 28 people per square mile. By population it ranks 80th of 102 counties in Illinois. Its county seat is Louisville.
Counties next to Clay County
If the property sits near a county line, the parcel may belong to a neighbor. These counties border Clay County:
Maps vs. surveys
Treat the map as a guide, not a boundary survey: parcel outlines are often shifted a bit from the real corners. A licensed surveyor settles exact lines.