South Dakota · FIPS 46079 · County seat: Madison
Lake County, SD GIS & Parcel Viewer
Lake County, South Dakota parcel data lives on the Lake County Beacon site. Open it below in a new tab, then use the short steps on this page to find a property fast.
Open the Lake County parcel map ↗
Opens beacon.schneidercorp.com in a new tab. We link out and never embed or copy parcel data.
Lake County at a glance
| Official map | Lake County Beacon site |
|---|---|
| Type | County-run map |
| Website | beacon.schneidercorp.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Madison |
| Population | 11,031 (2023 Census Bureau estimate) |
| Land area | 563 sq mi |
| FIPS code | 46079 |
About the official source
Lake 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.
Searching for a parcel, step by step
- 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.
Have a tax bill handy? The parcel or account number on it is usually the fastest way to search.
Lake County by the numbers
The U.S. Census Bureau estimated Lake County's population at 11,031 in 2023, spread over about 563 square miles of land, or roughly 20 people per square mile. By population it ranks 16th of 66 counties in South Dakota. Madison serves as the county seat.
Nearby parcel maps
Parcels close to the edge of Lake County can fall in the next county over. Neighboring counties:
A note on accuracy
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.