Iowa · FIPS 19121 · County seat: Winterset
Madison County, IA GIS & Parcel Viewer
Looking for lot lines or a parcel number in Madison County, IA? The quickest route is the Madison County Beacon site, the county parcel map we keep on file for this county. We link straight to it and add a few tips for getting around.
Open the Madison County parcel map ↗
Opens beacon.schneidercorp.com in a new tab. We link out and never embed or copy parcel data.
Madison County at a glance
| Official map | Madison County Beacon site |
|---|---|
| Type | County-run map |
| Website | beacon.schneidercorp.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Winterset |
| Population | 16,971 (2023 Census Bureau estimate) |
| Land area | 561 sq mi |
| FIPS code | 19121 |
Who runs this map
This map is published by or for Madison County itself, so it reflects the local parcel layer rather than a third-party copy. When we tested the link in October 2026 it opened with no login and no fee.
Finding a property on this map
- 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.
If an address search comes up empty, try the parcel number from a tax bill or deed instead, or click the lot on the map.
Madison County by the numbers
The U.S. Census Bureau estimated Madison County's population at 16,971 in 2023, spread over about 561 square miles of land, or roughly 30 people per square mile. By population it ranks 41st of 99 counties in Iowa. Its county seat is Winterset.
Neighboring counties
If the property sits near a county line, the parcel may belong to a neighbor. These counties border Madison County:
- Adair County (state list)
- Clarke County
- Dallas County (state list)
- Guthrie County
- Polk County
- Union County
- Warren County
Maps vs. surveys
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.