Public ArcGIS MapServer endpoint for Clark County parcel data. URL, supported fields, and a working sample query — copy it, or open it directly in the UrbanKit parcel lookup tool.
https://maps.clarkcountynv.gov/arcgis/rest/services/GISMO/AssessorMapv2/MapServer/1/query?where=APN+LIKE+'138%'&outFields=APN,PARCELTYPE,ASSR_ACRES&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 Parcel Number | YES |
| PARCELTYPE | Parcel Type (numeric code) | NO |
| TAX_DIST | Tax District | NO |
| CALC_ACRES | Calculated Acres | NO |
| ASSR_ACRES | Assessor Acres | NO |
947,045 polygon parcels covering Las Vegas, Henderson, North Las Vegas, Boulder City, and unincorporated Clark County. Verified 2026-05-11: APN LIKE '138%' wildcard query returns parcels. APN is an 11-digit Assessor Parcel Number with no internal punctuation in this layer. No owner-name on this AssessorMapv2/MapServer/1 layer; owner data lives on separate Clark County Assessor systems (paid bulk data subscription). For boundary geometry + APN-based queries, this layer is fully open.
Clark County Geographic Information Systems Management Office (GISMO) — https://www.clarkcountynv.gov/government/departments/geographic_info_systems/
/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.