Wisconsin · FIPS 55043 · County seat: Lancaster
Grant County, WI GIS & Parcel Viewer
Parcel lookups for Grant County start at the Grant 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 Grant County parcel map ↗
Opens gcarcgis.co.grant.wi.gov in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | Grant County ArcGIS parcel map |
|---|---|
| Type | County-run map |
| Website | gcarcgis.co.grant.wi.gov |
| Access | Free, no login (checked Oct 2026) |
| County seat | Lancaster |
| Population | 51,409 (2023 Census Bureau estimate) |
| Land area | 1,147 sq mi |
| FIPS code | 55043 |
Who runs this map
It is a county-level map: Grant County or the company it hires keeps the parcel layer up to date. 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; the viewer runs on Esri's ArcGIS platform.
- Find the search control and type in a street address or parcel ID, or zoom in by hand.
- Click a parcel to see the attributes the publisher shares.
- Use any layer or basemap tools to add aerial imagery or other map layers.
Many parcel sites expect owner names last name first. If a full name finds nothing, try just the surname.
The county in brief
The U.S. Census Bureau estimated Grant County's population at 51,409 in 2023, spread over about 1,147 square miles of land, or roughly 45 people per square mile. That makes it number 28 out of 72 Wisconsin counties by population. Its county seat is Lancaster.
Counties next to Grant County
If the property sits near a county line, the parcel may belong to a neighbor. These counties border Grant County:
- Crawford County
- Iowa County
- Lafayette County
- Richland County
- Clayton County, IA
- Dubuque County, IA
- Jo Daviess County, IL
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.