Arkansas · FIPS 05139 · County seat: El Dorado
Union County, AR GIS & Parcel Viewer
Use this page to reach the official statewide parcel map for Union County, Arkansas. The button below opens Arkansas GIS Office Tax Parcel Viewer 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 statewide map ↗
Opens agio.maps.arcgis.com in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | Arkansas GIS Office Tax Parcel Viewer |
|---|---|
| Type | Statewide map (covers all of Arkansas) |
| Website | agio.maps.arcgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | El Dorado |
| Population | 37,397 (2023 Census Bureau estimate) |
| Land area | 1,039 sq mi |
| FIPS code | 05139 |
About the official source
This is a statewide map, not a county site. Arkansas GIS Office Tax Parcel Viewer covers parcels across Arkansas, and Union County is one part of it. Because a state agency compiles this layer from local data, check with the Union County assessor or recorder before relying on a recent change. Our October 2026 check found the map open to the public, with no account or payment needed.
How to use the Union County viewer
- Open the statewide map with the button above.
- Search for an address in Union County, or zoom to the county on the map.
- Click a parcel to see the attributes the state layer includes.
- Write down the parcel number and use it for records searches with the Union County assessor or recorder.
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.
Union County by the numbers
Union County had an estimated 37,397 residents in 2023, according to the Census Bureau. With about 1,039 square miles of land, that works out to roughly 36 people per square mile. By population it ranks 21st of 75 counties in Arkansas. The county seat is El Dorado.
Neighboring counties
Parcels close to the edge of Union County can fall in the next county over. Neighboring counties:
- Ashley County
- Bradley County
- Calhoun County
- Columbia County
- Ouachita County
- Claiborne Parish, LA (state list)
- Morehouse Parish, LA (state list)
- Union Parish, LA (state list)
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.