Public ArcGIS MapServer 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.
https://gis.princegeorgescountymd.gov/arcgis/rest/services/Property/Property_Flattened/MapServer/0ACCOUNTAccount 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://gis.princegeorgescountymd.gov/arcgis/rest/services/Property/Property_Flattened/MapServer/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://gis.princegeorgescountymd.gov/arcgis/rest/services/Property/Property_Flattened/MapServer/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 |
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.
Prince George's County Maryland GIS, https://www.princegeorgescountymd.gov/665/Geographic-Information-Systems-GIS
Prince George's County's Property Flattened 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. All 10 listed fields accept queries. Served as an ArcGIS MapServer layer, which supports query operations but not write operations; last verified 2026-06-05.
/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?
gis.princegeorgescountymd.gov 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 MapServer layer on 2026-06-05. 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 by the county on gis.princegeorgescountymd.gov. Public ArcGIS endpoints rarely rate-limit individual reads, but gis.princegeorgescountymd.gov 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.