Illinois · FIPS 17143 · County seat: Peoria
Peoria County, IL GIS & Parcel Viewer
Looking for lot lines or a parcel number in Peoria County, IL? The quickest route is the Peoria County 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 Peoria County parcel map ↗
Opens gis.peoriacounty.gov in a new tab. We link out and never embed or copy parcel data.
Peoria County at a glance
| Official map | Peoria County parcel map |
|---|---|
| Type | County-run map |
| Website | gis.peoriacounty.gov |
| Access | Free, no login (checked Oct 2026) |
| County seat | Peoria |
| Population | 177,513 (2023 Census Bureau estimate) |
| Land area | 619 sq mi |
| FIPS code | 17143 |
About the official source
It is a county-level map: Peoria County or the company it hires keeps the parcel layer up to date. As of our October 2026 test, anyone could open it without signing in or paying.
Searching for a parcel, step by step
- Press the button above to open the county's own web map.
- Search for the property or pan and zoom to it.
- Click the lot to bring up what the county publishes about it.
- Look for print or measure tools if you need a quick map or rough size.
Have a tax bill handy? The parcel or account number on it is usually the fastest way to search.
The county in brief
Census Bureau figures put Peoria County at about 177,513 people (2023 estimate) on roughly 619 square miles of land, which is about 287 residents per square mile. Among Illinois's 102 counties, it is the 12th largest by population. Its county seat is Peoria.
Nearby parcel maps
Peoria County shares a border with the counties below. Each link has its own official map:
Before you rely on the lines
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.