Public ArcGIS MapServer endpoint for Pima County parcel data. URL, supported fields, and a working sample query, copy it, or open it directly in the UrbanKit parcel lookup tool.
https://mapdata.tucsonaz.gov/public/rest/services/PublicMaps/PropertyHousing/MapServer/17PARCELParcel Number (Pima County APN)ADDRESSEEOwner / Addressee NameSITE_ADDRESSSite AddressMAIL1Mailing Address Line 1MAIL2Mailing Address Line 2curl -s 'https://mapdata.tucsonaz.gov/public/rest/services/PublicMaps/PropertyHousing/MapServer/17/query?where=UPPER(ADDRESSEE)%20LIKE%20UPPER('%25SMITH%25')&outFields=PARCEL,ADDRESSEE,SITE_ADDRESS,SITE_ZIPCITY,TAXYR,FCV,USE_DESC&returnGeometry=false&f=json&resultRecordCount=10'https://mapdata.tucsonaz.gov/public/rest/services/PublicMaps/PropertyHousing/MapServer/17/query?where=UPPER(ADDRESSEE) LIKE UPPER('%SMITH%')&outFields=PARCEL,ADDRESSEE,SITE_ADDRESS,SITE_ZIPCITY,TAXYR,FCV,USE_DESC&returnGeometry=false&f=json&resultRecordCount=10Open this URL in a browser tab to see the raw ArcGIS JSON response.
| Field name | Label | Searchable |
|---|---|---|
| PARCEL | Parcel Number (Pima County APN) | YES |
| ADDRESSEE | Owner / Addressee Name | YES |
| SITE_ADDRESS | Site Address | YES |
| SITE_ZIPCITY | Site City | NO |
| TAXAREA | Tax Area Code | NO |
| FCV | Full Cash Value | NO |
| USE_DESC | Use Description | NO |
| TAXYR | Tax Year | NO |
| YearBuilt | Year Built | NO |
| MAIL1 | Mailing Address Line 1 | YES |
| MAIL2 | Mailing Address Line 2 | YES |
| legal_desc | Legal Description | NO |
75 fields confirmed. The PAREGION layer (layer 17) is the county-wide Pima County Assessor parcel layer, hosted on the City of Tucson mapdata.tucsonaz.gov ArcGIS server, which aggregates both City of Tucson and unincorporated Pima County parcels. Layer 40 (PAREGION_TUCSON) is the Tucson-only subset; use layer 17 for full county coverage. Owner-name field is ADDRESSEE (holds the assessor's addressee/taxpayer name, equivalent to owner name for most records). PARCEL format is alphanumeric (e.g. '101013880'). Also exposes FCV (Full Cash Value), TAXYR, USE_DESC, MAIL1-5 (mailing address), LEGAL1-5 (legal description), SITE_ADDRESS, SITE_ZIPCITY, SITE_ZIP, TAXAREA, GISACRES, CURZONE_OL (zoning), and YearBuilt. The supportsQuery field reads null in layer metadata (ArcGIS 11.3 quirk), but the service capabilities string is 'Map,Query,Data'. Queries work as confirmed by live testing. maxRecordCount=2000. The gisweb.pima.gov hostname NXDOMAINs; mapdata.tucsonaz.gov is the correct publicly accessible host.
City of Tucson / Pima County GIS, PropertyHousing MapServer (Pima Assessor PAREGION data), https://www.pima.gov/1796/Geographic-Information-Systems
Pima County's PAREGION layer exposes a parcel identifier (Parcel Number (Pima County APN)), owner names (Owner / Addressee Name), and address fields (Site Address, Mailing Address Line 1, Mailing Address Line 2). Use it for owner-name lookups and address-based parcel searches. 5 of 12 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 2026-05-14.
/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 Pima County actually publishes, not what you might expect from a national standard (there isn't one).
For background, see What is an APN?
mapdata.tucsonaz.gov serves Pima County, Arizona 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 Pima County's MapServer layer on 2026-05-14. 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.
Pima County's layer is hosted by the county on mapdata.tucsonaz.gov. Public ArcGIS endpoints rarely rate-limit individual reads, but mapdata.tucsonaz.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.