Montgomery County is Maryland's most populous jurisdiction and its most affluent. The County is located adjacent to the nation's capital, Washington, D.C., and includes 497 square miles of land area. The topography is rolling with small hills. Elevations range from 52 feet above sea level near the District Line to 850 feet in the northern portion of the County near Damascus.
The incorporated cities, towns, villages, and municipalities enact many of their own laws. The incorporated cities are Rockville, Gaithersburg, and Takoma Park. Other incorporated municipalities are Barnesville, Brookeville, Chevy Chase, Friendship Heights, Garrett Park, Glen Echo, Kensington, Laytonsville, Poolesville, Somerset, and Washington Grove.