Illinois · FIPS 17071 · County seat: Oquawka
Henderson County, IL GIS & Parcel Viewer
Use this page to reach the official county parcel map for Henderson County, Illinois. The button below opens the Henderson 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 Henderson County parcel map ↗
Opens gis.wiu.edu in a new tab. We link out and never embed or copy parcel data.
Quick facts
| Official map | Henderson County parcel map |
|---|---|
| Type | County-run map |
| Website | gis.wiu.edu |
| Access | Free, no login (checked Oct 2026) |
| County seat | Oquawka |
| Population | 6,088 (2023 Census Bureau estimate) |
| Land area | 379 sq mi |
| FIPS code | 17071 |
Who runs this map
It is a county-level map: Henderson County or the company it hires keeps the parcel layer up to date. When we tested the link in October 2026 it opened with no login and no fee.
How to use the Henderson County viewer
- 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.
Rural addresses don't always geocode well. When that happens, zoom in by hand and click the parcel, or search by owner name.
The county in brief
Henderson County had an estimated 6,088 residents in 2023, according to the Census Bureau. With about 379 square miles of land, that works out to roughly 16 people per square mile. By population it ranks 92nd of 102 counties in Illinois. Its county seat is Oquawka.
Neighboring counties
Parcels close to the edge of Henderson County can fall in the next county over. Neighboring counties:
A note on accuracy
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.