Illinois · FIPS 17001 · County seat: Quincy
Adams County, IL GIS & Parcel Viewer
Here is the direct link to the county parcel map covering Adams County, IL: the Adams County ArcGIS parcel map. Below you'll find basic facts about the county, steps for using the viewer, and nearby counties.
Open the Adams County parcel map ↗
Opens gis.adamscounty.org in a new tab. We link out and never embed or copy parcel data.
Adams County at a glance
| Official map | Adams County ArcGIS parcel map |
|---|---|
| Type | County-run map |
| Website | gis.adamscounty.org |
| Access | Free, no login (checked Oct 2026) |
| County seat | Quincy |
| Population | 64,441 (2023 Census Bureau estimate) |
| Land area | 855 sq mi |
| FIPS code | 17001 |
Where the parcel data comes from
This map is published by or for Adams 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
- Open the official link; it loads in ArcGIS Map Viewer, Esri's standard web map.
- Zoom to the area you want, or enter an address in the search field.
- Select a parcel to see its pop-up details.
- Try the Basemap gallery for satellite views, and the Measure tool if you want a rough distance or area.
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
Census Bureau figures put Adams County at about 64,441 people (2023 estimate) on roughly 855 square miles of land, which is about 75 residents per square mile. Among Illinois's 102 counties, it is the 23rd largest by population. Its county seat is Quincy.
Neighboring counties
If the property sits near a county line, the parcel may belong to a neighbor. These counties border Adams County:
Before you rely on the lines
Online parcel lines are drawn for tax and planning use. They can be off by several feet, so use a recorded plat or a licensed surveyor for fences, setbacks or a sale.