South Dakota · FIPS 46127 · County seat: Elk Point
Union County, SD GIS & Parcel Viewer
Use this page to reach the official county parcel map for Union County, South Dakota. The button below opens the Union County Beacon site in a new tab, so you can look up parcels by address, owner or parcel number on the source site itself.
Open the Union County parcel map ↗
Opens beacon.schneidercorp.com in a new tab. We link out and never embed or copy parcel data.
Quick facts
| Official map | Union County Beacon site |
|---|---|
| Type | County-run map |
| Website | beacon.schneidercorp.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Elk Point |
| Population | 17,183 (2023 Census Bureau estimate) |
| Land area | 461 sq mi |
| FIPS code | 46127 |
Where the parcel data comes from
It is a county-level map: Union 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.
How to use the Union County viewer
- Press the button above to open Beacon, the Schneider Geospatial parcel platform this county uses. Accept the usage terms if asked.
- Search by address, owner or parcel number, or zoom in and click a lot.
- From a parcel's pop-up, open the full record to see values, sales or building data where the county shares them.
- Switch layers on or off to compare parcels with aerials, zoning or other overlays.
Many parcel sites expect owner names last name first. If a full name finds nothing, try just the surname.
The county in brief
Union County had an estimated 17,183 residents in 2023, according to the Census Bureau. With about 461 square miles of land, that works out to roughly 37 people per square mile. That makes it number 13 out of 66 South Dakota counties by population. The county seat is Elk Point.
Counties next to Union County
Parcels close to the edge of Union County can fall in the next county over. Neighboring counties:
- Clay County
- Lincoln County
- Dakota County, NE
- Dixon County, NE
- Plymouth County, IA
- Sioux County, IA
- Woodbury County, IA
Before you rely on the lines
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.