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.
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://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?
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.