Montgomery County GIS Data (Maryland)

Search for Montgomery County, MD GIS data. A GIS data search can provide information on GIS maps, property lines, county lines, city lines, public property, elevations, flood zones, school boundaries, earthquake zones, property appraisal values, erosion, water pollutants, topography, soil composition, sewers, public utilities, building hazards, population information, demographic information, place names, public property, parks, campgrounds, trails, trail maps, historic maps, historic GIS maps, town maps, county maps, city maps, and neighborhood boundaries.


An Assessor Office is responsible for appraising the taxable property in an area in order to calculate property taxes in Montgomery County, Maryland. As part of this job, Montgomery County Assessors maintain detailed county and local maps, including Geographic Information Science (GIS) data. These Montgomery County GIS maps typically include property divisions, plots, buildings, property appraisal values, and property taxes. They may also include public property, parks, roads, place names, bodies of water, and other local geographical information, as well as flood zones, county zone lines, and school boundaries. These maps can be useful for a number of reasons, including buying and selling property. Assessors may provide online access to their Montgomery County GIS data on their websites.

Montgomery County Assessment Office Rockville MD 30 West Gude Drive 20850 240-314-4510


A Town or City Hall provides municipal services for their town or city, including keeping vital records and maintaining documents on their jurisdiction such as maps with GIS data in Montgomery County, Maryland. These GIS maps typically include property boundaries, real estate appraisal values, Montgomery County property tax assessments, public property, and unclaimed parcels. The maps may also show place names, Montgomery County zoning boundaries, bodies of water, and flood zones, as well as population and demographic information. Some Town and City Halls also maintain historical maps of their area. These maps are often available on the Town or City Hall website.

Barnesville Town Hall Barnesville MD 18001 Barnesville Road 20838 240-489-3036

Chevy Chase Town Hall Chevy Chase MD 4301 Willow Lane 20815 301-654-7144

Gaithersburg City Hall Gaithersburg MD 31 South Summit Avenue 20877 301-258-6300

Glen Echo Town Hall Glen Echo MD 6106 Harvard Avenue 20812 301-320-4041

Kensington Town Hall Kensington MD 3710 Mitchell Street 20895 301-949-2424

Laytonsville Town Hall Gaithersburg MD 21607 Laytonsville Road 20882 301-869-0042

Poolesville Town Hall Poolesville MD 19721 Beall St 20837 301-428-8927

Rockville City Hall Rockville MD 111 Maryland Avenue 20850 240-314-5000

Somerset Town Hall Chevy Chase MD 4510 Cumberland Avenue 20815 301-657-3211

Takoma Park City Hall Takoma Park MD 7500 Maple Avenue 20912 301-891-7100

Washington Grove Town Hall Washington Grove MD 300 Grove Avenue 20880 301-926-2256


A Building Department creates and enforces building codes and zoning regulations in order to ensure the construction of safe buildings in Montgomery County, Maryland. As part of that job, Building Departments maintain GIS data that can include Montgomery County GIS maps on the topography, elevation, soil composition, and flood zones for the local area. This information can be important for adhering to building codes and meeting zoning rules. These GIS maps may also show Montgomery County parcels, lots, subdivisions, and tracts of land, as well as sewers, public utilities, and other building hazards. GIS data may be available on the Building Department website.

Gaithersburg Planning Department Gaithersburg MD 31 South Summit Avenue 20877 301-258-6330

Maryland Planning Department North Potomac MD 14211 Quince Orchard Road 20878 301-208-0200

Montgomery County Permits Rockville MD 255 Rockville Pike 20850 240-777-6300

Rockville City Zoning Rockville MD 111 Maryland Avenue 20850 240-314-8220

Rockville Permits Rockville MD 111 Maryland Ave 20850 240-314-8240


A Clerk Office maintains public records for a county or local government, including GIS data in the form of maps. These GIS maps provide detailed information such as property boundaries, roads, public property, parks, and in some cases, population and demographic information. GIS data can also show Montgomery County property value assessments, property taxes, flood zones, zoning boundaries, and earthquake zones, as well as place names, bodies of water, and other geographic information. Clerks may also have historic GIS maps from the USGS or other organizations. Montgomery County GIS data is often accessible through the Clerk Office website.

Montgomery County Clerk Rockville MD 50 Maryland Avenue 20850 240-777-9464


A Recorder of Deeds keeps real estate documents to ensure the accuracy of property and land records in Montgomery County, Maryland. In addition to filing deeds that provide information on property sales and transfers, Recorders of Deeds also have detailed county and local maps, including Montgomery County GIS data. These maps can include property lines, building information, unclaimed parcels, property value assessments, and property tax information. They may also show Montgomery County place names, flood zones, zoning boundaries, neighborhood lines, bodies of water, and other geographic information. The Recorder of Deeds may provide access to GIS data on its website.

Montgomery County Recorder of Deeds Rockville MD 50 Maryland Avenue 20850 240-777-9466