Public ArcGIS FeatureServer endpoint for Waukesha County parcel data. URL, supported fields, and a working sample query — copy it, or open it directly in the UrbanKit parcel lookup tool.
https://gis.waukeshacounty.gov/host/rest/services/Web_Tax_Parcel/FeatureServer/2/query?where=UPPER(OWNERNAMEFULL) LIKE UPPER('%SMITH%')&outFields=TAXKEY,OWNERNAMEFULL,SITEADRESS,MUNI&returnGeometry=false&f=json&resultRecordCount=10Open this URL in a browser tab to see the raw ArcGIS JSON response.
| Field name | Label | Searchable |
|---|---|---|
| TAXKEY | Tax Key Number | YES |
| OWNERNAMEFULL | Owner Name (Full) | YES |
| OWNERNME1 | Owner Name 1 | YES |
| OWNERNME2 | Owner Name 2 | YES |
| SITEADRESS | Site Address | YES |
| PSTLADRESS | Postal Address | YES |
| MUNI | Municipality | NO |
| PROPCLASS | Property Class | NO |
Waukesha County (Milwaukee metro west, county seat Waukesha) exposes Web_Tax_Parcel/FeatureServer with 7 layers; layer 2 (Parcels) is the polygon tax parcel layer. Fields include TAXKEY, OWNERNAMEFULL (concatenated), OWNERNME1, OWNERNME2, SITEADRESS, ZIPCODE, TAXROLLYEAR, PLACENAME, PSTLADRESS, MUNI, PROPCLASS, AUXCLASS, SCHOOLDISTNO, LNDVALUE, IMPVALUE, CNTASSDVALUE, ESTFMKVALUE, GRSPRPTA, NETPRPTA, GISAcres. Query confirmed live: UPPER(OWNERNAMEFULL) LIKE '%SMITH%' returns real results (e.g., 'KENNETH H SMITH AND SUSAN A SMITH' at '17792 W JACOBS DR'). maxRecordCount 2000. The Web_Tax_Parcel FeatureServer layer 0 is Civil Divisions (municipalities), layer 1 is SimultaneousConveyance, layer 2 is the full parcel polygon with ownership data. Wisconsin uses a WIDORCODE (Wisconsin Department of Revenue code) for municipality identification alongside the standard FIPS.
Waukesha County Land Resources and Environment — https://www.waukeshacounty.gov/interactivemap
/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.