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Addressing and Road Naming
Frederick County GIS, under Interagency Information Technologies of Frederick County Government provides property addressing assignment and road naming approval in the land development process. The Frederick County GIS is responsible for approval of the use of all road naming in Frederick County, including all municipalities. The office is also responsible for addressing assignment of properties within the County but not within the municipalities.

In 1976 Frederick County developed a 1,000 foot by 1,000 foot addressing grid system to provide an enhanced numbering system to identify addressable structures. This was necessary to improve property and structure identification in order to aid public safety efforts throughout the County. Address numbers are assigned on a lot by lot basis with even numbers on the north and west sides of the road and odd numbers on the south and east sides of the road. Roadways running diagonally are identified as north/south or east/west based on the predominant direction. All proposed road names county-wide are submitted to the Frederick County GIS office for approval and reviewed for duplications and similarities to existing roads. This is performed in an effort to reduce the potential for confusion in the event of an emergency services request.

For additional information, please contact the Frederick County GIS Document Shop at 301-600-6750.

Address Request Form

The Addressing Request Form is required to apply for an address. Please be sure to complete the form and submit any of the required documents noted on the form. The Addressing Request Form is available here in PDF form.

Report an Address Error

Accurately mapped addresses are critical to various county functions including our 911 dispatch system.  To report address errors, please use our Address and Street Search Application to create a map and submit a Report Error form or simply email us at .