Illinois · FIPS 17013 · County seat: Hardin
Calhoun County, IL GIS & Parcel Viewer
Use this page to reach the official county parcel map for Calhoun County, Illinois. The button below opens Parcelviewer for Calhoun County in a new tab, so you can look up parcels by address, owner or parcel number on the source site itself.
Open the Calhoun County parcel map ↗
Opens gis.calhouncounty.org in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | Parcelviewer for Calhoun County |
|---|---|
| Type | County-run map |
| Website | gis.calhouncounty.org |
| Access | Free, no login (checked Oct 2026) |
| County seat | Hardin |
| Population | 4,317 (2023 Census Bureau estimate) |
| Land area | 254 sq mi |
| FIPS code | 17013 |
Who runs this map
This map is published by or for Calhoun 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.
Searching for a parcel, step by step
- 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.
Many parcel sites expect owner names last name first. If a full name finds nothing, try just the surname.
About Calhoun County
Calhoun County had an estimated 4,317 residents in 2023, according to the Census Bureau. With about 254 square miles of land, that works out to roughly 17 people per square mile. That makes it number 100 out of 102 Illinois counties by population. Another 30 square miles of water fall within its lines, according to Census mapping. Its county seat is Hardin.
Neighboring counties
If the property sits near a county line, the parcel may belong to a neighbor. These counties border Calhoun County:
- Greene County (state list)
- Jersey County
- Pike County
- Lincoln County, MO
- Pike County, MO
- St. Charles County, MO
A note on accuracy
The lines you see online are approximate. They're good for finding a lot and its parcel number, but a legal boundary question needs the recorded plat or a surveyor.