Clarksburg is a census-designated place and an unincorporated area in Northern Montgomery County, Maryland, United States, located along the Interstate 270 technology corridor about 4 miles North of Germantown, MD. As of Census 2010 it's population is 13,766.
As an unincorporated area, Clarksburg's boundaries are not officially defined. Clarksburg is, however, recognized by the United States Census Bureau as a Census-designated Place, and by the United States Geological Survey as a populated place located at 39°13′10″N 77°17′17″W / 39.21944°N 77.28806°W / 39.21944; -77.28806 (39.219488, -77.288001).
According to the United States Census Bureau, the place has a total area of 8.3 square miles (21.3 km²), of which, 8.2 square miles (21.2 km²) of it is land and 0.1 square miles (0.4 km²) of it (1.82%) is water.