Public ArcGIS MapServer endpoint for Riverside County parcel data. URL, supported fields, and a working sample query, copy it, or open it directly in the UrbanKit parcel lookup tool.
This page is the endpoint reference. If you came here to find a specific property, the Riverside County parcel search runs this same layer in your browser, no account and no API key.
Search Riverside County parcelsHave a street address but not the parcel number? Find the parcel number by address.
https://gis.countyofriverside.us/arcgis_mapping/rest/services/OpenData/Assessor/MapServer/50Field by field, whether any endpoint we index for Riverside County answers it, and the evidence for each. We only call a field restricted when there is a stated reason we can cite. Everything else here is a fact about the services we index, not a claim about the law.
| Field | Status | Basis |
|---|---|---|
| APN | Answered | Documented in a field list on an endpoint we index. Not every row is populated. |
| Owner name | Not published | PARCELS_CREST's own service description names PRIMARY_OWNER and ALL_OWNER_LIST as fields, but the live fields array returned by the public endpoint (?f=json) has no such column, and naming PRIMARY_OWNER in outFields fails with 'Failed to execute query.' The joined CREST tables on the same service carry no owner-name column either, and Riverside's other public host (arcgis_public) exposes only APN and FLAG on its Assessor Parcel layer, so no owner name is published on any Riverside County public REST endpoint found. Where to request it. |
| Owner mailing address | Answered | Documented in a field list on an endpoint we index. Not every row is populated. |
| Site address | Answered | Documented in a field list on an endpoint we index. Not every row is populated. |
| Geometry | Answered | Documented in a field list on an endpoint we index. Not every row is populated. |
| Land use | Answered | Documented in a field list on an endpoint we index. Not every row is populated. |
| Zoning | Not published | No endpoint we index for this county documents this field, so a query cannot ask for it. That is a fact about the services we index, not a legal restriction, and not a statement that the county holds no such record. Where to request it. |
APNAssessor's Parcel NumberSITUS_STREETSite Street AddressSITUS_CITYSite CityMAIL_STREETMailing Street Addresscurl -s 'https://gis.countyofriverside.us/arcgis_mapping/rest/services/OpenData/Assessor/MapServer/50/query?where=UPPER(SITUS_CITY)+LIKE+UPPER('%25RIVERSIDE%25')&outFields=APN,SITUS_STREET,SITUS_CITY,MAIL_STREET,MAIL_CITY&returnGeometry=false&f=json&resultRecordCount=10'https://gis.countyofriverside.us/arcgis_mapping/rest/services/OpenData/Assessor/MapServer/50/query?where=UPPER(SITUS_CITY)+LIKE+UPPER('%RIVERSIDE%')&outFields=APN,SITUS_STREET,SITUS_CITY,MAIL_STREET,MAIL_CITY&returnGeometry=false&f=json&resultRecordCount=10Open this URL in a browser tab to see the raw ArcGIS JSON response.
| Field name | Label | Searchable |
|---|---|---|
| APN | Assessor's Parcel Number | YES |
| SITUS_STREET | Site Street Address | YES |
| SITUS_CITY | Site City | YES |
| ZIP_CODE | Site ZIP | NO |
| MAIL_STREET | Mailing Street Address | YES |
| MAIL_CITY | Mailing City | NO |
| SUBDIVISION_NAME | Subdivision Name | NO |
| ACREAGE | Assessed Acreage | NO |
| LAND | Assessed Land Value | NO |
| STRUCTURES | Assessed Structure Value | NO |
| CLASS_CODE | Land Use Class | NO |
Riverside County publishes assessor parcels on its arcgis_mapping host as layer 50 PARCELS_CREST of the OpenData/Assessor MapServer. The layer carries the APN, the situs address (SITUS_STREET, SITUS_CITY and the street components), the owner's mailing address without a name (MAIL_STREET, MAIL_CITY), and the subdivision, acreage, land-use class and assessed land and structure values. The service description names PRIMARY_OWNER and ALL_OWNER_LIST fields, but the public schema carries neither, and naming PRIMARY_OWNER in outFields fails with 'Failed to execute query.' Owner name is therefore recorded as not published (see capabilityOverrides). The county's other public host, arcgis_public, exposes only APN and FLAG on its parcel layer. CORS reflects the request's Origin. Re-verified 2026-09-26: the layer holds 846,251 parcels and a situs-city query returned live rows.
Riverside County Assessor-County Clerk-Recorder / Riverside County Information Technology (RCIT) GIS, https://gis.rivco.org/pages/data-distribution
Riverside County's PARCELS_CREST layer exposes a parcel identifier (Assessor's Parcel Number) and address fields (Site Street Address, Site City, Mailing Street Address). Use it for address-to-PIN lookups and identifier queries. 4 of 11 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 2026-09-26.
/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 Riverside County actually publishes, not what you might expect from a national standard (there isn't one).
For background, see What is an APN?
gis.countyofriverside.us serves Riverside County, California 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 Riverside County's MapServer layer on 2026-09-26. 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.
Riverside County's layer is hosted by the county on gis.countyofriverside.us. Public ArcGIS endpoints rarely rate-limit individual reads, but gis.countyofriverside.us 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.