South Dakota · FIPS 46051 · County seat: Milbank
Grant County, SD GIS & Parcel Viewer
Grant County, South Dakota parcel data lives on the Grant County planning-district WebGIS viewer. Open it below in a new tab, then use the short steps on this page to find a property fast.
Open the Grant County parcel map ↗
Opens 1stdistrict.org in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | Grant County planning-district WebGIS viewer |
|---|---|
| Type | County-run map |
| Website | 1stdistrict.org |
| Access | Free, no login (checked Oct 2026) |
| County seat | Milbank |
| Population | 7,553 (2023 Census Bureau estimate) |
| Land area | 681 sq mi |
| FIPS code | 46051 |
Where the parcel data comes from
It is a county-level map: Grant County or the company it hires keeps the parcel layer up to date. Our October 2026 check found the map open to the public, with no account or payment needed.
How to use the Grant County viewer
- Open the official link; the map is hosted on planning-district WebGIS, a vendor platform used by 43 counties in our directory.
- Accept any disclaimer, then use the search tool to find a street address, owner or parcel ID.
- Click a parcel to view its attributes.
- Use the layer or basemap controls to add aerials and other layers where the county provides them.
Many parcel sites expect owner names last name first. If a full name finds nothing, try just the surname.
About Grant County
The U.S. Census Bureau estimated Grant County's population at 7,553 in 2023, spread over about 681 square miles of land, or roughly 11 people per square mile. That makes it number 23 out of 66 South Dakota counties by population. The county seat is Milbank.
Neighboring counties
Parcels close to the edge of Grant County can fall in the next county over. Neighboring counties:
- Codington County
- Day County
- Deuel County
- Roberts County
- Big Stone County, MN (state list)
- Lac qui Parle County, MN
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.