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/0TLIDTax Lot IDaccount_idAccount IDMAILING_NAMailing Name (Owner)M_ADDRESSMailing AddressSITUS_STRESitus Street NameSITUS_CITYSitus Citycurl -s 'https://services3.arcgis.com/tNPgIZWOB0Efvm0g/ArcGIS/rest/services/Tax_Lots/FeatureServer/0/query?where=UPPER(MAILING_NA)+LIKE+UPPER('%25SMITH%25')&outFields=TLID,MAILING_NA,M_ADDRESS,SITUS_HOUS,SITUS_STRE,SITUS_CITY&returnGeometry=false&f=json&resultRecordCount=10'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 |
| PROPERTY_C | Property Class | 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/
Multnomah County's Tax Lots layer exposes owner names (Mailing Name (Owner)) and address fields (Mailing Address, Situs Street Name, Situs City). Use it for owner-name lookups and address-based parcel searches. 6 of 13 listed fields accept queries; the rest are returned on read but not indexed for search. Served as an ArcGIS FeatureServer layer, so edits and applyEdits operations are technically exposed (read access only is published here); last verified 2026-05-15.
/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 Multnomah County actually publishes, not what you might expect from a national standard (there isn't one).
For background, see What is an APN?
services3.arcgis.com serves Multnomah County, Oregon 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 Multnomah County's FeatureServer layer on 2026-05-15. 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.
Multnomah County's layer is hosted on Esri ArcGIS Online. Public ArcGIS endpoints rarely rate-limit individual reads, but services3.arcgis.com 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.