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ATLAS · STATE·MD

Maryland county
parcel REST APIs.

2 counties indexed. ArcGIS FeatureServer and MapServer URLs, with supported search fields per layer.

Endpoint URLs · 2 counties

Montgomery County, MDhttps://mcmaps.org/server11/rest/services/Overlays/MCAtlas_Property_Points/FeatureServer/0
Prince George's County, MDhttps://gis.princegeorgescountymd.gov/arcgis/rest/services/Property/Property_Flattened/MapServer/0

Counties indexed in this state, with endpoint counts, supported fields, and the registry's listing status. The registry listing is a curation record, not a live check — see the status page for what the liveness probe last observed.
County	Endpoints	Searchable fields	Registry listing	Action
Montgomery County	1	Tax Account Number · Owner Name · Owner Name 2 +5	LISTED LIVE	OPEN
Prince George's County	1	Account Number · Property ID · Owner Name +7	LISTED LIVE	OPEN

Questions, with answers

Maryland parcel REST API, common questions

Which Maryland counties publish a public parcel ArcGIS REST API?

2 Maryland counties are indexed in the UrbanKit atlas with verified public REST endpoints: Montgomery and Prince George's. Each exposes an owner-name field you can search directly on the public layer.

How do I search Maryland parcels by owner name?

Montgomery and Prince George's expose an owner-name field on the public REST layer. Montgomery, for example, uses the OWNERS_NAME field. A case-insensitive search is ?where=UPPER(OWNERS_NAME)%20LIKE%20UPPER('%25SMITH%25')&outFields=*&f=json. Open a county's page here for its full field list and a ready-to-run sample query.

What is the ArcGIS REST URL for parcels in Montgomery, Maryland?

Montgomery publishes parcels at https://mcmaps.org/server11/rest/services/Overlays/MCAtlas_Property_Points/FeatureServer/0, a FeatureServer (layer 0). It indexes by Tax Account Number, Owner Name, Owner Name 2, and Site House Number. Owner-name search: UPPER(OWNERS_NAME) LIKE UPPER('%25SMITH%25').

Do Maryland parcel layers use ArcGIS FeatureServer or MapServer?

Both. Maryland uses a mix: Montgomery publish ArcGIS FeatureServer layers, while Prince George's use MapServer. Both support /query, so the same owner, parcel-ID, and address lookups work against either.

Listing missing or moved? Tell us. A full four-shard sweep checks every endpoint every two hours, with degraded endpoints re-checked every 30 minutes.