Montana · FIPS 30065 · County seat: Roundup
Musselshell County, MT GIS & Parcel Viewer
Musselshell County, Montana parcel data lives on Montana Cadastral (Montana State Library). Open it below in a new tab, then use the short steps on this page to find a property fast.
Open the Musselshell County statewide map ↗
Opens svc.mt.gov in a new tab. We link out and never embed or copy parcel data.
Quick facts
| Official map | Montana Cadastral (Montana State Library) |
|---|---|
| Type | Statewide map (covers all of Montana) |
| Website | svc.mt.gov |
| Access | Free, no login (checked Oct 2026) |
| County seat | Roundup |
| Population | 5,308 (2023 Census Bureau estimate) |
| Land area | 1,869 sq mi |
| FIPS code | 30065 |
About the official source
This is a statewide map, not a county site. Montana Cadastral (Montana State Library) covers parcels across Montana, and Musselshell County is one part of it. Because a state agency compiles this layer from local data, check with the Musselshell County assessor or recorder before relying on a recent change. As of our October 2026 test, anyone could open it without signing in or paying.
Finding a property on this statewide map
- Open the statewide map with the button above.
- Search for an address in Musselshell 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 Musselshell County assessor or recorder.
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
The U.S. Census Bureau estimated Musselshell County's population at 5,308 in 2023, spread over about 1,869 square miles of land, or roughly 2.8 people per square mile. Among Montana's 56 counties, it is the 35th largest by population. Its county seat is Roundup.
Nearby parcel maps
Musselshell County shares a border with the counties below. Each link has its own official map:
A note on accuracy
Treat the map as a guide, not a boundary survey: parcel outlines are often shifted a bit from the real corners. A licensed surveyor settles exact lines.