Public ArcGIS MapServer endpoint for Flathead County parcel data. URL, supported fields, and a working sample query — copy it, or open it directly in the UrbanKit parcel lookup tool.
https://gisservicemt.gov/arcgis/rest/services/MSDI_Framework/Parcels/MapServer/0PARCELIDParcel IDOwnerNameOwner NameAddressLine1Property Addresscurl -s 'https://gisservicemt.gov/arcgis/rest/services/MSDI_Framework/Parcels/MapServer/0/query?where=CountyName%3D'Flathead'+AND+UPPER(OwnerName)+LIKE+UPPER('%25SMITH%25')&outFields=PARCELID,OwnerName,AddressLine1,CityStateZip,CountyName&returnGeometry=false&f=json&resultRecordCount=10'https://gisservicemt.gov/arcgis/rest/services/MSDI_Framework/Parcels/MapServer/0/query?where=CountyName='Flathead'+AND+UPPER(OwnerName)+LIKE+UPPER('%SMITH%')&outFields=PARCELID,OwnerName,AddressLine1,CityStateZip,CountyName&returnGeometry=false&f=json&resultRecordCount=10Open this URL in a browser tab to see the raw ArcGIS JSON response.
| Field name | Label | Searchable |
|---|---|---|
| PARCELID | Parcel ID | YES |
| OwnerName | Owner Name | YES |
| OwnerAddress1 | Owner Address Line 1 | NO |
| OwnerAddress2 | Owner Address Line 2 | NO |
| OwnerCity | Owner City | NO |
| OwnerState | Owner State | NO |
| OwnerZipCode | Owner ZIP Code | NO |
| AddressLine1 | Property Address | YES |
| CityStateZip | Property City/State/ZIP | NO |
| CountyName | County Name (Flathead) | NO |
| COUNTYCD | County Code (7 = Flathead) | NO |
| TotalValue | Total Assessed Value | NO |
| TaxYear | Tax Year | NO |
Flathead County MT (Kalispell; county seat Kalispell; FIPS 30029; gateway to Glacier National Park) is served by the Montana statewide parcel layer (COUNTYCD=7). Filter CountyName='Flathead' to scope to this county. Same schema and endpoint as other Montana counties. Verified 2026-06-20: SMITH query returns Kalispell-area addresses.
Montana State Library / Montana Spatial Data Infrastructure (MSDI) — https://msl.mt.gov/geoinfo/
Flathead County's Parcels layer exposes a parcel identifier (Parcel ID), owner names (Owner Name), and address fields (Property Address). Use it for owner-name lookups and address-based parcel searches. 3 of 13 listed fields accept queries; the rest are returned on read but not indexed for search. Served as an ArcGIS MapServer layer, which supports query operations but not write operations; last verified 2026-06-20.
/query?where=…&outFields=*&f=jsonto the URL. The sample query above is a working example you can paste into a browser tab to see the raw JSON response.Counties publish parcel data through their own ArcGIS Server installations, each with its own schema. One county uses APN, another uses PIN, a third uses PARCEL_ID. Some expose owner names; others keep them on a separate assessor's portal. The searchable fields list above reflects what Flathead County actually publishes — not what you might expect from a national standard (there isn't one).
For background, see What is an APN?
Many county servers allow public reads but block browser cross-origin requests. The UrbanKit parcel lookup tool fetches directly from your browser; if it works there, the layer is technically public. For your own integration, you may need a same-origin proxy or server-side fetch.
Possibly — counties move services without warning. We re-verify entries weekly and flag stale ones. If you're seeing a fresh 404, please let us know and we'll update the listing.
Most are. Public ArcGIS layers don't typically rate-limit individual reads, but heavy programmatic use can trigger throttling at the host level. Be respectful — query what you need.