Public ArcGIS FeatureServer endpoint for Prince George's 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 Prince George's County parcel search runs this same layer in your browser, no account and no API key.
Search Prince George's County parcelsHave a street address but not the parcel number? Find the parcel number by address.
https://services1.arcgis.com/qS7AYixGtf3sv8B6/arcgis/rest/services/Property_Flattened_Py/FeatureServer/0Field by field, whether any endpoint we index for Prince George's 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 | Answered | Documented in a field list on an endpoint we index. Not every row is populated. |
| Owner mailing address | Answered | Documented in a field list on an endpoint we index. Not every row is populated. |
| Site address | Answered | Documented in a field list on an endpoint we index. Not every row is populated. |
| 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. |
ACCOUNTAccount NumberPROPERTY_IDProperty IDOWNER_NAMEOwner NameICO_NAMEIn Care Of NameHOUSE_NUMBERSite House NumberSTREET_NAMESite Street NameSTREET_TYPESite Street TypeMAIL_STREETMailing Street AddressMAIL_CITYMailing CityMAIL_ZIP5Mailing ZIPcurl -s 'https://services1.arcgis.com/qS7AYixGtf3sv8B6/arcgis/rest/services/Property_Flattened_Py/FeatureServer/0/query?where=UPPER(OWNER_NAME)+LIKE+UPPER('%25SMITH%25')&outFields=ACCOUNT,PROPERTY_ID,OWNER_NAME,HOUSE_NUMBER,STREET_NAME,STREET_TYPE,MAIL_STREET,MAIL_CITY,MAIL_ZIP5&returnGeometry=false&f=json&resultRecordCount=10'https://services1.arcgis.com/qS7AYixGtf3sv8B6/arcgis/rest/services/Property_Flattened_Py/FeatureServer/0/query?where=UPPER(OWNER_NAME)+LIKE+UPPER('%SMITH%')&outFields=ACCOUNT,PROPERTY_ID,OWNER_NAME,HOUSE_NUMBER,STREET_NAME,STREET_TYPE,MAIL_STREET,MAIL_CITY,MAIL_ZIP5&returnGeometry=false&f=json&resultRecordCount=10Open this URL in a browser tab to see the raw ArcGIS JSON response.
| Field name | Label | Searchable |
|---|---|---|
| ACCOUNT | Account Number | YES |
| PROPERTY_ID | Property ID | YES |
| OWNER_NAME | Owner Name | YES |
| ICO_NAME | In Care Of Name | YES |
| HOUSE_NUMBER | Site House Number | YES |
| STREET_NAME | Site Street Name | YES |
| STREET_TYPE | Site Street Type | YES |
| MAIL_STREET | Mailing Street Address | YES |
| MAIL_CITY | Mailing City | YES |
| MAIL_ZIP5 | Mailing ZIP | YES |
| HOUSE_SUFFIX | House Number Suffix | NO |
| UNIT | Unit Number | NO |
Prince George's County is Maryland's second-most populous county (pop. 910,000; county seat Upper Marlboro). The Property_Flattened MapServer on gis.princegeorgescountymd.gov (ArcGIS Server 11.5) is the county's canonical public property layer with 112 fields and 352,791 parcels. Live query confirmed OWNER_NAME exposure. Key fields: ACCOUNT (county account number, 7 digits), PROPERTY_ID (prefixed as '12' + ACCOUNT for the full 9-digit SDAT account number), OWNER_NAME, ICO_NAME (in-care-of), HOUSE_NUMBER (zero-padded 6-digit, e.g. '002909'), STREET_NAME, STREET_TYPE, STREET_DIRECTION, MAIL_STREET/CITY/STATE/ZIP5 (owner mailing address), ASSESS_DIST (assessment district), LAND_AREA_ACRE, LAND_AREA_SQFT, LIBER, FOLIO, SUB_NAME, CONDO_UNIT_NUMBER, TAXMAPGRID. The situs address is split across HOUSE_NUMBER + STREET_NAME + STREET_TYPE. There is no single combined site address field on this layer. The county belongs to the M-NCPPC (Maryland-National Capital Park and Planning Commission) planning region and uses Maryland SDAT for the authoritative ownership record. Prince George's County borders DC and contains the University of Maryland (College Park) and Joint Base Andrews. 2026-10-03: the registered endpoint moved from the county MapServer to the Planning Department's hosted ArcGIS Online copy of the same layer (Property_Flattened_Py FeatureServer on services1.arcgis.com, owner Planning_PGCO_MD, CORS open, maxRecordCount 2000, 353,381 parcels). The reason is a county-side defect, not a schema change: gis.princegeorgescountymd.gov is load-balanced and one backend node lacks the layers, so about every second request to any service on the host (Property_Flattened, Property_Centroids, Property, AddressPoints) answers HTTP 200 with a Layer not found error body, metadata and queries alike, whatever the where clause. The liveness cron does not retry an HTTP 200 error body, so the county flapped between live and degraded. The hosted copy has the same field names (every declared searchField present, plus MAIL_STATE) and returned the same first row as the county host on its good turns, with 18 of 18 probes answering. The old host is deliberately not kept as a second endpoint, because the cron grades a county by its worst endpoint. Caveat: the hosted copy is a periodic refresh by the Planning Department (stamped Updated 20260923), so its freshness is days, not minutes; switch back once the county host answers consistently. Credit: Prince George's County Planning Department (M-NCPPC). The Planning Department's open-data page (https://gisdata.pgplanning.org/opendata/) says: "You can copy, modify, distribute, and perform analysis on the data, even for commercial purposes, all without asking permission, but please provide attribution to the Prince George's County Planning Department."
Prince George's County Maryland GIS, https://www.princegeorgescountymd.gov/665/Geographic-Information-Systems-GIS
Prince George's County's Property_Flattened_Py layer exposes owner names (Owner Name) and address fields (Site House Number, Site Street Name, Site Street Type, Mailing Street Address). Use it for owner-name lookups and address-based parcel searches. 10 of 12 listed fields accept queries; the rest are returned on read but not indexed for search. Served as an ArcGIS FeatureServer layer, so edits and applyEdits operations are technically exposed (read access only is published here); last verified 2026-10-03.
/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 Prince George's County actually publishes, not what you might expect from a national standard (there isn't one).
For background, see What is an APN?
services1.arcgis.com serves Prince George's County, Maryland 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 Prince George's County's FeatureServer layer on 2026-10-03. 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.
Prince George's County's layer is hosted on Esri ArcGIS Online. Public ArcGIS endpoints rarely rate-limit individual reads, but services1.arcgis.com 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.