Montana county
parcel REST APIs.

5 counties indexed. ArcGIS FeatureServer and MapServer URLs, with supported search fields per layer.

Endpoint URLs · 5 counties

Yellowstone County, MThttps://gisservice.mt.gov/arcgis/rest/services/msdi_cadastral_map_v1/MapServer/1
Missoula County, MThttps://gisservice.mt.gov/arcgis/rest/services/msdi_cadastral_map_v1/MapServer/1
Cascade County, MThttps://gisservice.mt.gov/arcgis/rest/services/msdi_cadastral_map_v1/MapServer/1
Flathead County, MThttps://gisservice.mt.gov/arcgis/rest/services/msdi_cadastral_map_v1/MapServer/1
Gallatin County, MThttps://gisservice.mt.gov/arcgis/rest/services/msdi_cadastral_map_v1/MapServer/1

Looking for one property instead of an endpoint? Type a Montana street address into Find My Parcel Number and it returns the parcel number from the county's own records.

Counties indexed in this state, with endpoint counts, supported fields, and the registry's listing status. The registry listing is a curation record, not a live check — see the status page for what the liveness probe last observed.
County	Endpoints	Searchable fields	Registry listing	Action
Cascade County	1	Parcel ID · Owner Name · Property Address	LISTED LIVE	Open
Flathead County	1	Parcel ID · Owner Name · Property Address	LISTED LIVE	Open
Gallatin County	1	Parcel ID · Owner Name · Property Address	LISTED LIVE	Open
Missoula County	1	Parcel ID · Owner Name · Property Address	LISTED LIVE	Open
Yellowstone County	1	Parcel ID · Owner Name · Property Address	LISTED LIVE	Open

County index · 5 counties

All 5 Montana counties

Each county links to its atlas entry, endpoint URL, searchable fields, and a sample query where one is published.

Questions, with answers

Montana parcel REST API, common questions

Which Montana counties publish a public parcel ArcGIS REST API?

5 Montana counties are indexed in the UrbanKit atlas with verified public REST endpoints: Yellowstone, Missoula, Cascade, Flathead, and Gallatin. Each exposes an owner-name field you can search directly on the public layer.

How do I search Montana parcels by owner name?

Yellowstone, Missoula, Cascade, Flathead, and Gallatin expose an owner-name field on the public REST layer. Yellowstone, for example, uses the OwnerName field. A case-insensitive search is ?where=UPPER(OwnerName)%20LIKE%20UPPER('%25SMITH%25')&outFields=*&f=json. Open a county's page here for its full field list and a ready-to-run sample query.

What is the ArcGIS REST URL for parcels in Yellowstone, Montana?

Yellowstone publishes parcels at https://gisservice.mt.gov/arcgis/rest/services/msdi_cadastral_map_v1/MapServer/1, a MapServer (layer 1). It indexes by Parcel ID, Owner Name, and Property Address. Owner-name search: UPPER(OwnerName) LIKE UPPER('%25SMITH%25').

Do Montana parcel layers use ArcGIS FeatureServer or MapServer?

Montana's indexed counties (Yellowstone, Missoula, Cascade, Flathead, and Gallatin) publish county-hosted ArcGIS MapServer layers. MapServer supports the same /query operation for owner, parcel-ID, and address lookups as FeatureServer. For read-only parcel lookups the two are interchangeable.

Listing missing or moved? and include its current URL if you have it. A full four-shard sweep checks every endpoint every two hours, with degraded endpoints re-checked every 30 minutes.