Illinois · FIPS 17067 · County seat: Carthage
Hancock County, IL GIS & Parcel Viewer
Parcel lookups for Hancock County start at the Hancock County ArcGIS parcel map. This page gives you that official link, notes on how the viewer works, and links to the counties next door.
Open the Hancock County parcel map ↗
Opens experience.arcgis.com in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | Hancock County ArcGIS parcel map |
|---|---|
| Type | County-run map |
| Website | experience.arcgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Carthage |
| Population | 17,186 (2023 Census Bureau estimate) |
| Land area | 794 sq mi |
| FIPS code | 17067 |
Where the parcel data comes from
Hancock County runs this viewer (directly or through a contracted vendor), which makes it the closest thing to the source for local parcel lines. As of our October 2026 test, anyone could open it without signing in or paying.
Finding a property on this map
- Open the link. This viewer is an ArcGIS Experience Builder app, so its layout is custom to the publisher.
- Look for a search box or search widget and type in a street address or parcel ID.
- Click a parcel to see its details in a pop-up or side panel.
- Check the toolbar for a layer list or basemap switcher if you want aerials or other layers.
Have a tax bill handy? The parcel or account number on it is usually the fastest way to search.
Hancock County by the numbers
Census Bureau figures put Hancock County at about 17,186 people (2023 estimate) on roughly 794 square miles of land, which is about 22 residents per square mile. Among Illinois's 102 counties, it is the 60th largest by population. The county seat is Carthage.
Neighboring counties
Hancock County shares a border with the counties below. Each link has its own official map:
- Adams County
- Henderson County
- McDonough County
- Schuyler County
- Clark County, MO
- Lee County, IA
- Lewis County, MO
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.