Iowa · FIPS 19119 · County seat: Rock Rapids
Lyon County, IA GIS & Parcel Viewer
Use this page to reach the official county parcel map for Lyon County, Iowa. The button below opens the Lyon 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 Lyon 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 | Lyon County Beacon site |
|---|---|
| Type | County-run map |
| Website | beacon.schneidercorp.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Rock Rapids |
| Population | 12,324 (2023 Census Bureau estimate) |
| Land area | 588 sq mi |
| FIPS code | 19119 |
Where the parcel data comes from
This map is published by or for Lyon County itself, so it reflects the local parcel layer rather than a third-party copy. Our October 2026 check found the map open to the public, with no account or payment needed.
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.
Rural addresses don't always geocode well. When that happens, zoom in by hand and click the parcel, or search by owner name.
Lyon County by the numbers
Lyon County had an estimated 12,324 residents in 2023, according to the Census Bureau. With about 588 square miles of land, that works out to roughly 21 people per square mile. Among Iowa's 99 counties, it is the 61st largest by population. Its county seat is Rock Rapids.
Counties next to Lyon County
If the property sits near a county line, the parcel may belong to a neighbor. These counties border Lyon County:
- O'Brien County
- Osceola County
- Sioux County
- Lincoln County, SD
- Minnehaha County, SD
- Nobles County, MN
- Rock County, MN
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.