Illinois · FIPS 17197 · County seat: Joliet
Will County, IL GIS & Parcel Viewer
Use this page to reach the official county parcel map for Will County, Illinois. The button below opens the Will County parcel map in a new tab, so you can look up parcels by address, owner or parcel number on the source site itself.
Open the Will County parcel map ↗
Opens gisapp.willcountyillinois.com in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | Will County parcel map |
|---|---|
| Type | County-run map |
| Website | gisapp.willcountyillinois.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Joliet |
| Population | 700,728 (2023 Census Bureau estimate) |
| Land area | 836 sq mi |
| FIPS code | 17197 |
Who runs this map
This map is published by or for Will County itself, so it reflects the local parcel layer rather than a third-party copy. As of our October 2026 test, anyone could open it without signing in or paying.
Finding a property on this map
- Open the official link in a new tab.
- Accept any disclaimer, then look for a search box that takes street addresses, owners or parcel IDs.
- Zoom in and click a parcel to see its details.
- Use the map's layer controls to add aerials or other layers if they're offered.
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.
Will County by the numbers
The U.S. Census Bureau estimated Will County's population at 700,728 in 2023, spread over about 836 square miles of land, or roughly 838 people per square mile. That makes it number 4 out of 102 Illinois counties by population. Joliet serves as the county seat.
Neighboring counties
Parcels close to the edge of Will County can fall in the next county over. Neighboring counties:
Maps vs. surveys
Keep in mind that a GIS parcel layer is a tax map, not a survey. For exact boundaries, look at the recorded deed and plat or hire a licensed land surveyor.