Public ArcGIS MapServer endpoint for Allegheny County parcel data. URL, supported fields, and a working sample query, copy it, or open it directly in the UrbanKit parcel lookup tool.
This page is the endpoint reference. If you came here to find a specific property, the Allegheny County parcel search runs this same layer in your browser, no account and no API key.
Search Allegheny County parcels →https://gisdata.alleghenycounty.us/arcgis/rest/services/EGIS/Web_Parcels/MapServer/0Field by field, whether any endpoint we index for Allegheny County answers it, and the evidence for each. We only call a field restricted when there is a stated reason we can cite. Everything else here is a fact about the services we index, not a claim about the law.
| Field | Status | Basis |
|---|---|---|
| APN | Answered | Documented in a field list on an endpoint we index. Not every row is populated. |
| Owner name | Not published | No endpoint we index for this county documents this field, so a query cannot ask for it. That is a fact about the services we index, not a legal restriction, and not a statement that the county holds no such record. Where to request it. |
| Owner mailing address | Not published | No endpoint we index for this county documents this field, so a query cannot ask for it. That is a fact about the services we index, not a legal restriction, and not a statement that the county holds no such record. Where to request it. |
| Site address | Not published | No endpoint we index for this county documents this field, so a query cannot ask for it. That is a fact about the services we index, not a legal restriction, and not a statement that the county holds no such record. Where to request it. |
| Geometry | Answered | Documented in a field list on an endpoint we index. Not every row is populated. |
| Land use | Not published | No endpoint we index for this county documents this field, so a query cannot ask for it. That is a fact about the services we index, not a legal restriction, and not a statement that the county holds no such record. Where to request it. |
| Zoning | Not published | No endpoint we index for this county documents this field, so a query cannot ask for it. That is a fact about the services we index, not a legal restriction, and not a statement that the county holds no such record. Where to request it. |
PINParcel Identification NumberMAPBLOCKLOTMap-Block-Lot Referencecurl -s 'https://gisdata.alleghenycounty.us/arcgis/rest/services/EGIS/Web_Parcels/MapServer/0/query?where=PIN+LIKE+'%250364%25'&outFields=PIN,MAPBLOCKLOT&returnGeometry=false&f=json&resultRecordCount=10'
https://gisdata.alleghenycounty.us/arcgis/rest/services/EGIS/Web_Parcels/MapServer/0/query?where=PIN+LIKE+'%0364%'&outFields=PIN,MAPBLOCKLOT&returnGeometry=false&f=json&resultRecordCount=10Open this URL in a browser tab to see the raw ArcGIS JSON response.
| Field name | Label | Searchable |
|---|---|---|
| PIN | Parcel Identification Number | YES |
| MAPBLOCKLOT | Map-Block-Lot Reference | YES |
Only 5 fields on the public Web_Parcels endpoint: OBJECTID, PIN, MAPBLOCKLOT, SHAPE, SHAPE.STArea(), SHAPE.STLength(). This is geometry + parcel ID only. Owner name is NOT exposed on the public REST layer. The EGIS folder on gisdata.alleghenycounty.us contains only 4 services (Web_Parcels, Buildings, Municipalities, AC_AddressPointsWithLabels). Full owner/address data is accessible through the Allegheny County Real Estate portal at alleghenyco.us/property-assessment and the county's block-lot lookup at property.alleghenycounty.us. These are browser-only, not REST-queryable. The WPRDC open data portal at data.wprdc.org has property assessment data as a CSV/API download.
Allegheny County Department of Information Technology, GIS Division, https://openac-alcogis.opendata.arcgis.com/
Allegheny County's Parcels layer exposes a parcel identifier (Parcel Identification Number). Use it for PIN-keyed record pulls (owner-name search lives on a separate assessor system). Both 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 Allegheny County actually publishes, not what you might expect from a national standard (there isn't one).
For background, see What is an APN?
gisdata.alleghenycounty.us serves Allegheny County, Pennsylvania parcels over public ArcGIS REST, but, like most county servers, it may not send the CORS headers a browser needs for a cross-origin fetch. If a direct browser call fails, the layer still works from curl, Postman, or a server-side script; the UrbanKit parcel lookup tool proxies the request, so a search that succeeds there confirms the layer is genuinely public.
We last verified Allegheny County's MapServer layer on 2026-05-11. County GIS teams move services without notice, so if you hit a fresh 404, tell us and we'll re-check. Atlas entries are re-verified on a rolling basis.
Allegheny County's layer is hosted by the county on gisdata.alleghenycounty.us. Public ArcGIS endpoints rarely rate-limit individual reads, but gisdata.alleghenycounty.us can throttle heavy automated traffic at the host level. Page through results with resultOffset / resultRecordCount and request only the fields you need. There's no API key and no charge from the county.