Public ArcGIS MapServer endpoint for Harris County parcel data. URL, supported fields, and a working sample query — copy it, or open it directly in the UrbanKit parcel lookup tool.
https://www.gis.hctx.net/arcgis/rest/services/HCAD/Parcels/MapServer/0HCAD_NUMHCAD Parcel Numberacct_numAccount Numberowner_name_1Owner Name (Primary)owner_name_2Owner Name 2site_str_numSite Street Numbersite_str_nameSite Street Namesite_citySite Citysite_zipSite ZIPmail_addr_1Mailing Addresscurl -s 'https://www.gis.hctx.net/arcgis/rest/services/HCAD/Parcels/MapServer/0/query?where=UPPER(owner_name_1)%20LIKE%20UPPER('%25SMITH%25')&outFields=HCAD_NUM,owner_name_1,site_str_num,site_str_name,site_city&returnGeometry=false&f=json&resultRecordCount=10'https://www.gis.hctx.net/arcgis/rest/services/HCAD/Parcels/MapServer/0/query?where=UPPER(owner_name_1) LIKE UPPER('%SMITH%')&outFields=HCAD_NUM,owner_name_1,site_str_num,site_str_name,site_city&returnGeometry=false&f=json&resultRecordCount=10Open this URL in a browser tab to see the raw ArcGIS JSON response.
| Field name | Label | Searchable |
|---|---|---|
| HCAD_NUM | HCAD Parcel Number | YES |
| acct_num | Account Number | YES |
| owner_name_1 | Owner Name (Primary) | YES |
| owner_name_2 | Owner Name 2 | YES |
| site_str_num | Site Street Number | YES |
| site_str_name | Site Street Name | YES |
| site_city | Site City | YES |
| site_zip | Site ZIP | YES |
| mail_addr_1 | Mailing Address | YES |
Harris County, Texas (Houston metro, pop. 4.7M, county seat Houston) is the most populous Texas county and third-most populous in the US. The data authority is HCAD — Harris Central Appraisal District — which maintains property appraisal records independently of the county government. 62 fields confirmed, including HCAD_NUM (parcel ID), acct_num, owner_name_1/2/3 (up to three ownership slots with own_pct_1/2/3 percentage shares), site_str_num, site_str_name, site_city, site_zip, mail_addr_1/2/3, mail_city, mail_state, mail_zip, land_use, land_value, bld_value, total_appraised_val, new_owner_date, and yr_impr. Owner name is public under the Texas Public Information Act; Texas Tax Code §25.025 allows certain categories of persons (peace officers, judges, domestic violence victims, and others) to request suppression of their home address from appraisal district records. Owner-name LIKE query confirmed live. Max record count = 1000 per query. The HCAD open-data hub at geo-harriscounty.opendata.arcgis.com provides bulk downloads. A sibling service on the same server covers HCAD_MUD (Municipal Utility District) boundaries.
Harris County Appraisal District (HCAD) GIS Division — https://geo-harriscounty.opendata.arcgis.com/
Harris County's HCAD Parcels layer exposes a parcel identifier (HCAD Parcel Number), owner names (Owner Name (Primary), Owner Name 2), and address fields (Site Street Number, Site Street Name, Site City, Site ZIP, Mailing Address). Use it for owner-name lookups and address-based parcel searches. All 9 listed fields accept queries. 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 Harris 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.