Illinois · FIPS 17073 · County seat: Cambridge
Henry County, IL GIS & Parcel Viewer
Use this page to reach the official county parcel map for Henry County, Illinois. The button below opens Henry County, IL Map in a new tab, so you can look up parcels by address, owner or parcel number on the source site itself.
Open the Henry County parcel map ↗
Opens henryil.wthgis.com in a new tab. We link out and never embed or copy parcel data.
Henry County at a glance
| Official map | Henry County, IL Map |
|---|---|
| Type | County-run map |
| Website | henryil.wthgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Cambridge |
| Population | 48,448 (2023 Census Bureau estimate) |
| Land area | 823 sq mi |
| FIPS code | 17073 |
About the official source
This map is published by or for Henry 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
- Press the button above. This county's viewer runs on WTH GIS; 44 counties in our directory use the same service.
- Find the search option and look up a property, or zoom in on the map.
- Click a lot to see its details.
- Check the toolbar for layers, measuring and printing.
Rural addresses don't always geocode well. When that happens, zoom in by hand and click the parcel, or search by owner name.
Henry County by the numbers
Census Bureau figures put Henry County at about 48,448 people (2023 estimate) on roughly 823 square miles of land, which is about 59 residents per square mile. Among Illinois's 102 counties, it is the 29th largest by population. Its county seat is Cambridge.
Nearby parcel maps
Henry County shares a border with the counties below. Each link has its own official map:
Before you rely on the lines
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.