Wyoming · FIPS 56037 · County seat: Green River
Sweetwater County, WY GIS & Parcel Viewer
Here is the direct link to the county parcel map covering Sweetwater County, WY: Terra GIS Web for Sweetwater County. Below you'll find basic facts about the county, steps for using the viewer, and nearby counties.
Open the Sweetwater 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 Sweetwater County |
|---|---|
| Type | County-run map |
| Website | maps.terragis.net |
| Access | Free, no login (checked Oct 2026) |
| County seat | Green River |
| Population | 41,249 (2023 Census Bureau estimate) |
| Land area | 10,427 sq mi |
| FIPS code | 56037 |
Where the parcel data comes from
It is a county-level map: Sweetwater County or the company it hires keeps the parcel layer up to date. As of our October 2026 test, anyone could open it without signing in or paying.
Finding a property on this map
- Press the button above. This county's viewer runs on TerraGIS; 14 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.
Rural addresses don't always geocode well. When that happens, zoom in by hand and click the parcel, or search by owner name.
The county in brief
Sweetwater County had an estimated 41,249 residents in 2023, according to the Census Bureau. With about 10,427 square miles of land, that works out to roughly 4.0 people per square mile. By population it ranks 4th of 23 counties in Wyoming. Green River serves as the county seat.
Counties next to Sweetwater County
If the property sits near a county line, the parcel may belong to a neighbor. These counties border Sweetwater County:
- Carbon County
- Fremont County
- Lincoln County
- Sublette County
- Uinta County
- Daggett County, UT
- Moffat County, CO
- Summit County, UT
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.