Iowa · FIPS 19053 · County seat: Leon
Decatur County, IA GIS & Parcel Viewer
Use this page to reach the official county parcel map for Decatur County, Iowa. The button below opens the Decatur County myGISonline viewer in a new tab, so you can look up parcels by address, owner or parcel number on the source site itself.
Open the Decatur County parcel map ↗
Opens portico.mygisonline.com in a new tab. We link out and never embed or copy parcel data.
Decatur County at a glance
| Official map | Decatur County myGISonline viewer |
|---|---|
| Type | County-run map |
| Website | portico.mygisonline.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Leon |
| Population | 7,665 (2023 Census Bureau estimate) |
| Land area | 532 sq mi |
| FIPS code | 19053 |
Who runs this map
This map is published by or for Decatur 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.
How to use the Decatur County viewer
- Press the button above. This county's viewer runs on myGISonline; 13 counties in our directory use the same service.
- Find the search option and look up a property, or zoom in on the map.
- Click a lot to see its details.
- Check the toolbar for layers, measuring and printing.
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.
Decatur County by the numbers
Census Bureau figures put Decatur County at about 7,665 people (2023 estimate) on roughly 532 square miles of land, which is about 14 residents per square mile. By population it ranks 86th of 99 counties in Iowa. Leon serves as the county seat.
Nearby parcel maps
Decatur County shares a border with the counties below. Each link has its own official map:
- Clarke County
- Lucas County
- Ringgold County
- Union County
- Wayne County
- Harrison County, MO (state list)
- Mercer County, MO (state list)
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.