Public ArcGIS MapServer endpoint for Humboldt 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 Humboldt County parcel search runs this same layer in your browser, no account and no API key.
Search Humboldt County parcelsHave a street address but not the parcel number? Find the parcel number by address.
https://cty-gis-web.co.humboldt.ca.us/server/rest/services/Parcels/Parcels/MapServer/0Field by field, whether any endpoint we index for Humboldt 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 | Answered | Documented in a field list on an endpoint we index. Not every row is populated. |
| Zoning | Answered | Documented in a field list on an endpoint we index. Not every row is populated. |
APN_12Assessor's Parcel Number (APN, 12-digit dashed)APNAPN (9-digit, no dashes)FULLADDRSitus Addresscurl -s 'https://cty-gis-web.co.humboldt.ca.us/server/rest/services/Parcels/Parcels/MapServer/0/query?where=APN_12+LIKE+'304-221%25'&outFields=APN,APN_12,FULLADDR,SITCITY,SITZIP,ZONING,GEN_PLAN,USECODE&returnGeometry=false&f=json&resultRecordCount=10'
https://cty-gis-web.co.humboldt.ca.us/server/rest/services/Parcels/Parcels/MapServer/0/query?where=APN_12+LIKE+'304-221%'&outFields=APN,APN_12,FULLADDR,SITCITY,SITZIP,ZONING,GEN_PLAN,USECODE&returnGeometry=false&f=json&resultRecordCount=10Open this URL in a browser tab to see the raw ArcGIS JSON response.
| Field name | Label | Searchable |
|---|---|---|
| APN_12 | Assessor's Parcel Number (APN, 12-digit dashed) | YES |
| APN | APN (9-digit, no dashes) | YES |
| FULLADDR | Situs Address | YES |
| SITCITY | Situs City | NO |
| SITZIP | Situs ZIP | NO |
| ZONING | Zoning | NO |
| GEN_PLAN | General Plan | NO |
| USECODE | Use Code | NO |
| YEAR_BUILT | Year Built | NO |
| ACRES | GIS Acres | NO |
| LEGAL | Legal Description | NO |
Humboldt County, California (FIPS 06023; Eureka, Arcata, Fortuna) publishes its parcel layer on its own ArcGIS Server as Parcels/Parcels, MapServer layer 0 'Parcels': 72,721 parcels on 2026-10-08 (unincorporated areas plus Arcata, Eureka and Trinidad city data), maxRecordCount 2000, resultRecordCount accepted, answers the caller's Origin with Access-Control-Allow-Origin, point and attribute queries return in about 0.3 s. Owner name is NOT on this public layer (no owner or mailing column among its fields), so an owner search is not offered.The parcel number is APN_12 (304-221-003-000, dashed, with a -000 suffix) and APN, the same number as 9 digits without dashes (304221003). The situs is FULLADDR (123 EXAMPLE RD) with SITCITY and SITZIP; about 53,000 rows have a non-empty FULLADDR, but unaddressed parcels hold a single space rather than null, so test for a blank before trusting it. Other attributes: ZONING, GEN_PLAN, USECODE, YEAR_BUILT (often blank), ACRES, LEGAL, LAT/LON. The layer description (Version 5.2) says the data is useful for planning purposes but should not be relied upon to determine property, zoning or general plan boundaries; copyrightText is 'Humboldt County GIS'. No separate terms page was found, so licenseUrl is the county's Web GIS page.
Humboldt County Planning and Building Department (Advance Planning, GIS), https://humboldtgov.org/1461/Web-GIS
Humboldt County's Parcels layer exposes parcel identifiers (Assessor's Parcel Number (APN, 12-digit dashed), APN (9-digit, no dashes)) and address fields (Situs Address). Use it for address-to-PIN lookups and identifier queries. 3 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 2026-10-08.
/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 Humboldt County actually publishes, not what you might expect from a national standard (there isn't one).
For background, see What is an APN?
cty-gis-web.co.humboldt.ca.us serves Humboldt 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 Humboldt County's MapServer layer on 2026-10-08. 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.
Humboldt County's layer is hosted by the county on cty-gis-web.co.humboldt.ca.us. Public ArcGIS endpoints rarely rate-limit individual reads, but cty-gis-web.co.humboldt.ca.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.