Winnebago County parcel REST endpoint not yet listed.
Winnebago County does not have a verified public ArcGIS REST parcel endpoint in our directory. Many counties run their parcel layers on the assessor's portal or behind a viewer-only interface. If you know the URL, send it in.
Winnebago County IL GIS is operated by WinGIS (wingis.org), a regional GIS services company on a subscription model. Their ArcGIS REST server at maps.wingis.org/public/rest/services/PropertySearch/MapServer is indexed as containing Parcel & Lot Lines, Parcel Owner, PIN Labels, and Parcel Dimensions layers — but all REST queries return HTTP 499 (Token Required). The word 'public' in the URL path is a directory naming convention, not an access grant. The public-facing search at wingis.org/maps/propertysearch is browser-only and not queryable. No alternative county-hosted ArcGIS REST endpoint was found. The Supervisor of Assessments at assessor.wincoil.gov has a property lookup UI but no public REST API.
WinGIS (Winnebago County GIS partner) — https://wingis.org/
/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.