Public ArcGIS MapServer endpoint for Missoula County parcel data. URL, supported fields, and a working sample query, copy it, or open it directly in the UrbanKit parcel lookup tool.
https://gisservice.mt.gov/arcgis/rest/services/msdi_cadastral_map_v1/MapServer/1PARCELIDParcel IDOwnerNameOwner NameAddressLine1Property Addresscurl -s 'https://gisservice.mt.gov/arcgis/rest/services/msdi_cadastral_map_v1/MapServer/1/query?where=CountyName%3D'Missoula'+AND+UPPER(OwnerName)+LIKE+UPPER('%25SMITH%25')&outFields=PARCELID,OwnerName,AddressLine1,CityStateZip,CountyName&returnGeometry=false&f=json&resultRecordCount=10'https://gisservice.mt.gov/arcgis/rest/services/msdi_cadastral_map_v1/MapServer/1/query?where=CountyName='Missoula'+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 (Missoula) | NO |
| COUNTYCD | County Code (4 = Missoula) | NO |
| TotalValue | Total Assessed Value | NO |
| TaxYear | Tax Year | NO |
Missoula County MT (Missoula; county seat Missoula; FIPS 30063; home to University of Montana) is served by the Montana statewide parcel layer (COUNTYCD=4). Filter CountyName='Missoula' to scope to this county. Same schema and endpoint as other Montana counties (MSDI Framework Parcels/MapServer/0). Verified 2026-06-20: SMITH query returns Missoula-area addresses.
Montana State Library / Montana Spatial Data Infrastructure (MSDI), https://msl.mt.gov/geoinfo/
Missoula County's Montana 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 Missoula County actually publishes, not what you might expect from a national standard (there isn't one).
For background, see What is an APN?
gisservice.mt.gov serves Missoula County, Montana parcels over public ArcGIS REST, but, like most county servers, it may not send the CORS headers a browser needs for a cross-origin fetch. If a direct browser call fails, the layer still works from curl, Postman, or a server-side script; the UrbanKit parcel lookup tool proxies the request, so a search that succeeds there confirms the layer is genuinely public.
We last verified Missoula County's MapServer layer on 2026-06-20. County GIS teams move services without notice, so if you hit a fresh 404, tell us and we'll re-check. Atlas entries are re-verified on a rolling basis.
Missoula County's layer is hosted by the county on gisservice.mt.gov. Public ArcGIS endpoints rarely rate-limit individual reads, but gisservice.mt.gov can throttle heavy automated traffic at the host level. Page through results with resultOffset / resultRecordCount and request only the fields you need. There's no API key and no charge from the county.