Montana · FIPS 30031 · County seat: Bozeman
Gallatin County, MT GIS & Parcel Viewer
Looking for lot lines or a parcel number in Gallatin County, MT? The quickest route is the Gallatin County ArcGIS parcel map, the county parcel map we keep on file for this county. We link straight to it and add a few tips for getting around.
Open the Gallatin County parcel map ↗
Opens gis.gallatincounty911.com in a new tab. We link out and never embed or copy parcel data.
Gallatin County at a glance
| Official map | Gallatin County ArcGIS parcel map |
|---|---|
| Type | County-run map |
| Website | gis.gallatincounty911.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Bozeman |
| Population | 126,409 (2023 Census Bureau estimate) |
| Land area | 2,605 sq mi |
| FIPS code | 30031 |
About the official source
This map is published by or for Gallatin County itself, so it reflects the local parcel layer rather than a third-party copy. When we tested the link in October 2026 it opened with no login and no fee.
Searching for a parcel, step by step
- Open the link. This viewer is an ArcGIS Experience Builder app, so its layout is custom to the publisher.
- Look for a search box or search widget and type in a street address or parcel ID.
- Click a parcel to see its details in a pop-up or side panel.
- Check the toolbar for a layer list or basemap switcher if you want aerials or other layers.
Have a tax bill handy? The parcel or account number on it is usually the fastest way to search.
Gallatin County by the numbers
Gallatin County had an estimated 126,409 residents in 2023, according to the Census Bureau. With about 2,605 square miles of land, that works out to roughly 49 people per square mile. By population it ranks 2nd of 56 counties in Montana. The county seat is Bozeman.
Counties next to Gallatin County
Parcels close to the edge of Gallatin County can fall in the next county over. Neighboring counties:
- Broadwater County
- Jefferson County
- Madison County
- Meagher County
- Park County
- Fremont County, ID
- Park County, WY
- Teton County, WY
Before you rely on the lines
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.