Public ArcGIS FeatureServer endpoint for Multnomah County parcel data. URL, supported fields, and a working sample query — copy it, or open it directly in the UrbanKit parcel lookup tool.
https://services3.arcgis.com/tNPgIZWOB0Efvm0g/ArcGIS/rest/services/Tax_Lots/FeatureServer/0/query?where=UPPER(MAILING_NA)+LIKE+UPPER('%SMITH%')&outFields=TLID,MAILING_NA,M_ADDRESS,SITUS_HOUS,SITUS_STRE,SITUS_CITY&returnGeometry=false&f=json&resultRecordCount=10Open this URL in a browser tab to see the raw ArcGIS JSON response.
| Field name | Label | Searchable |
|---|---|---|
| TLID | Tax Lot ID | YES |
| account_id | Account ID | YES |
| MAILING_NA | Mailing Name (Owner) | YES |
| M_ADDRESS | Mailing Address | YES |
| M_CITY | Mailing City | NO |
| M_STATE | Mailing State | NO |
| zip | Mailing ZIP | NO |
| SITUS_HOUS | Situs House Number | NO |
| SITUS_STRE | Situs Street Name | YES |
| SITUS_CITY | Situs City | YES |
| SITUS_ZIP | Situs ZIP | NO |
| RMV_PROPER | Real Market Value (Property) | NO |
| PROP_TYPE | Property Type | NO |
46 fields confirmed including TLID, GlobalID, StatedArea, ID, account_id, tax_status, map_tax, MAP, Taxlot, S_I_TYPE, SI_NUMBER, MAILING_NA, IN_CARE_OF, AGENT, M_ADDRESS, M_CITY, M_STATE, zip, YEAR, ma, sa, nh, RMV_PROPER, PROPERTY_C, CODE_AREA, SUM_OF_ACR, SUM_OF_SQF, SITUS_HOUS (house number), SITUS_STRE, SITUS_ST_1, SITUS_DIRE, SITUS_UNIT, SITUS_CITY, SITUS_STAT, SITUS_ZIP, SITUS_PRE_. Owner name search via UPPER() LIKE on MAILING_NA returns real results (e.g., 'SMITH TIMOTHY BLAIR & KAREN KAY'). Hosted on ArcGIS Online (services3.arcgis.com/tNPgIZWOB0Efvm0g). Parcel boundaries are approximated — not for determining legal property boundaries. This data is from Multnomah County Assessment, Recording and Taxation, covering Portland and all of Multnomah County (pop. 830,000). Capabilities: Query, Sync.
Multnomah County Department of Assessment, Recording and Taxation — GIS — https://gis-multco.opendata.arcgis.com/
/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 this 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.