Public ArcGIS MapServer endpoint for Orange 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 Orange County parcel search runs this same layer in your browser, no account and no API key.
Search Orange County parcels →https://www.ocgis.com/arcpub/rest/services/Map_Layers/Parcels/MapServer/0Field by field, whether any endpoint we index for Orange 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 | 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. |
| Owner mailing address | 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. |
| 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 | 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. |
| 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. |
ASSESSMENT_NOAssessment Number (APN)SITE_ADDRESSSite Addresscurl -s 'https://www.ocgis.com/arcpub/rest/services/Map_Layers/Parcels/MapServer/0/query?where=ASSESSMENT_NO+LIKE+'%25072-478%25'&outFields=ASSESSMENT_NO,SITE_ADDRESS,YEAR_BUILT&returnGeometry=false&f=json&resultRecordCount=10'
https://www.ocgis.com/arcpub/rest/services/Map_Layers/Parcels/MapServer/0/query?where=ASSESSMENT_NO+LIKE+'%072-478%'&outFields=ASSESSMENT_NO,SITE_ADDRESS,YEAR_BUILT&returnGeometry=false&f=json&resultRecordCount=10Open this URL in a browser tab to see the raw ArcGIS JSON response.
| Field name | Label | Searchable |
|---|---|---|
| ASSESSMENT_NO | Assessment Number (APN) | YES |
| SITE_ADDRESS | Site Address | YES |
| YEAR_BUILT | Year Built | NO |
| NBR_BEDROOMS | Bedrooms | NO |
Orange County CA (Anaheim/Santa Ana/Irvine), 687,000+ parcels. Only 6 fields on the public REST endpoint: ASSESSMENT_NO, SITE_ADDRESS, YEAR_BUILT, NBR_BEDROOMS, SHAPE, OBJECTID. Owner name is NOT on this public layer. The ASSESSMENT_NO is the APN with hyphens (e.g. '072-478-23'). Full assessor data is available through the ParcelQuest partnership at the county assessor portal (ocassessor.gov). This domain (ocgis.com) is Orange County California Public Works GIS. Note that Orange County Florida's GIS uses ocfl.net.
Orange County Public Works GIS / OC Survey, https://data-ocpw.opendata.arcgis.com/
Orange County's Parcels layer exposes a parcel identifier (Assessment Number (APN)) and address fields (Site Address). Use it for address-to-PIN lookups and identifier queries. 2 of 4 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 2026-05-15.
/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 Orange County actually publishes, not what you might expect from a national standard (there isn't one).
For background, see What is an APN?
www.ocgis.com serves Orange 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 Orange County's MapServer 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.
Orange County's layer is hosted by the county on www.ocgis.com. Public ArcGIS endpoints rarely rate-limit individual reads, but www.ocgis.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.