Montana · FIPS 30027 · County seat: Lewistown
Fergus County, MT GIS & Parcel Viewer
Parcel lookups for Fergus County start at Montana Cadastral (Montana State Library). This page gives you that official link, notes on how the viewer works, and links to the counties next door.
Open the Fergus County statewide map ↗
Opens svc.mt.gov in a new tab. We link out and never embed or copy parcel data.
Fergus County at a glance
| 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 | Lewistown |
| Population | 11,772 (2023 Census Bureau estimate) |
| Land area | 4,339 sq mi |
| FIPS code | 30027 |
Where the parcel data comes from
Fergus County doesn't have its own viewer in our directory, so we point you to a statewide map: Montana Cadastral (Montana State Library). Zoom in on Fergus County to see its parcels. A statewide layer can trail the county's own books by weeks or months, so treat it as a fast first look rather than the final word. As of our October 2026 test, anyone could open it without signing in or paying.
How to use the Fergus County viewer
- Open the statewide map with the button above.
- Search for an address in Fergus 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 Fergus 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.
Fergus County by the numbers
Fergus County had an estimated 11,772 residents in 2023, according to the Census Bureau. With about 4,339 square miles of land, that works out to roughly 2.7 people per square mile. That makes it number 18 out of 56 Montana counties by population. Lewistown serves as the county seat.
Neighboring counties
Fergus County shares a border with the counties below. Each link has its own official map:
- Blaine County
- Chouteau County
- Golden Valley County
- Judith Basin County
- Musselshell County
- Petroleum County
- Phillips County
- Wheatland County
Maps vs. surveys
Online parcel lines are drawn for tax and planning use. They can be off by several feet, so use a recorded plat or a licensed surveyor for fences, setbacks or a sale.