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/1APNAssessor Parcel Numbercurl -s 'https://maps.clarkcountynv.gov/arcgis/rest/services/GISMO/AssessorMapv2/MapServer/1/query?where=APN+LIKE+%27138%25%27&outFields=APN,PARCELTYPE,ASSR_ACRES&returnGeometry=false&f=json&resultRecordCount=10'
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 |
Clark County, Nevada (Las Vegas metro, pop. 2.3M, county seat Las Vegas) contains roughly 73% of Nevada's total population. The AssessorMapv2/MapServer is the public parcel geometry layer published by the Clark County Geographic Information Systems Management Office (GISMO). 947,045 polygon parcels covering Las Vegas, Henderson, North Las Vegas, Boulder City, Mesquite, 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 dashes or spaces). Layer 1 of AssessorMapv2 is the parcel polygon layer; layer 0 is a label annotation layer. Owner name is NOT on this public REST layer. For owner-name lookups, use the Clark County Assessor's web portal at maps.clarkcountynv.gov/assessor/AssessorParcelDetail/ownr.aspx (search by owner name) or the Real Property Records Search at clarkcountynv.gov/government/assessor/property_search/real-property-records; both are free browser tools. Bulk ownership data from the Assessor requires a paid subscription. GISMO open-data hub: clarkcountygis-ccgismo.hub.arcgis.com.
Clark County Geographic Information Systems Management Office (GISMO) — https://www.clarkcountynv.gov/government/departments/geographic_info_systems/
Clark County's Parcels layer exposes a parcel identifier (Assessor Parcel Number). Use it for PIN-keyed record pulls (owner-name search lives on a separate assessor system). 1 of 5 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 2026-05-11.
/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 Clark 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.