Illinois · FIPS 17007 · County seat: Belvidere
Boone County, IL GIS & Parcel Viewer
Boone County, Illinois parcel data lives on Boone County, Illinois Property Search. Open it below in a new tab, then use the short steps on this page to find a property fast.
Open the Boone County parcel map ↗
Opens arcgis.com in a new tab. We link out and never embed or copy parcel data.
Quick facts
| Official map | Boone County, Illinois Property Search |
|---|---|
| Type | County-run map |
| Website | arcgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Belvidere |
| Population | 53,202 (2023 Census Bureau estimate) |
| Land area | 281 sq mi |
| FIPS code | 17007 |
Who runs this map
This map is published by or for Boone County itself, so it reflects the local parcel layer rather than a third-party copy. Our October 2026 check found the map open to the public, with no account or payment needed.
Finding a property on this map
- Press the button above. The map opens in Esri's ArcGIS Map Viewer in a new tab.
- Type an address or place name into the search box at the top, or drag and zoom the map yourself.
- Click inside a parcel outline. A pop-up lists whatever attributes the publisher shares, such as a parcel ID or acreage.
- Open the Layers panel to hide or show parcels, and use the Basemap button to switch to aerial imagery.
Many parcel sites expect owner names last name first. If a full name finds nothing, try just the surname.
About Boone County
The U.S. Census Bureau estimated Boone County's population at 53,202 in 2023, spread over about 281 square miles of land, or roughly 189 people per square mile. By population it ranks 26th of 102 counties in Illinois. The county seat is Belvidere.
Neighboring counties
If the property sits near a county line, the parcel may belong to a neighbor. These counties border Boone County:
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.