Montgomery County GIS Data

Montgomery County Government makes standard GIS datasets publicly available at no cost.  However, in some cases, the County may charge a fee ($75 per hour) to cover the cost to produce a non-standard GIS dataset.

Standard GIS datasets are available at the County GIS Open Data site for browsing and download.

Please also check dataMontgomery for departmental operations data that have been geo-processed (X, Y assigned or service area assigned)

Please review the County's Terms of Use before using data provided by the County.


To obtain base map data layers such as property or planimetric data from the Maryland National Capital Park and Planning Commission (M-NCPPC), please visit M-NCPPC GIS Data Downloads.

Washington DC Metropolitan Area

Federal Government