Wyoming · FIPS 56003 · County seat: Basin
Big Horn County, WY GIS & Parcel Viewer
Parcel lookups for Big Horn County start at Terra GIS Web for Big Horn County. This page gives you that official link, notes on how the viewer works, and links to the counties next door.
Open the Big Horn County parcel map ↗
Opens maps.terragis.net in a new tab. We link out and never embed or copy parcel data.
Quick facts
| Official map | Terra GIS Web for Big Horn County |
|---|---|
| Type | County-run map |
| Website | maps.terragis.net |
| Access | Free, no login (checked Oct 2026) |
| County seat | Basin |
| Population | 12,018 (2023 Census Bureau estimate) |
| Land area | 3,137 sq mi |
| FIPS code | 56003 |
Who runs this map
This map is published by or for Big Horn County itself, so it reflects the local parcel layer rather than a third-party copy. As of our October 2026 test, anyone could open it without signing in or paying.
How to use the Big Horn County viewer
- Open the official link; the map is hosted on TerraGIS, a vendor platform used by 14 counties in our directory.
- Accept any disclaimer, then use the search tool to find a street address, owner or parcel ID.
- Click a parcel to view its attributes.
- Use the layer or basemap controls to add aerials and other layers where the county provides them.
Rural addresses don't always geocode well. When that happens, zoom in by hand and click the parcel, or search by owner name.
Big Horn County by the numbers
Big Horn County had an estimated 12,018 residents in 2023, according to the Census Bureau. With about 3,137 square miles of land, that works out to roughly 3.8 people per square mile. By population it ranks 15th of 23 counties in Wyoming. Basin serves as the county seat.
Counties next to Big Horn County
Parcels close to the edge of Big Horn County can fall in the next county over. Neighboring counties:
A note on accuracy
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.