Germantown is an urbanized census-designated place in Montgomery County, Maryland in the United States. It is the third most populous place in Maryland (after Baltimore and Columbia), with a population of 86,395 as of 2010. If it were to incorporate along CDP boundaries, it would become the second largest incorporated city in Maryland. It is located approximately 25 miles outside of Washington DC and is part of the Washington Metropolitan Area. The Churchill Town Sector at the corner of Route 118 and Middlebrook Road most closely resembles the center of Germantown, because of the location of the Up County Government Center, the library, the Black Rock Arts Center, the multiplex cinema, and the pedestrian shopping that features an array of restaurants. Three exits to I-270 are less than one mile away, the MARC train is walking distance, and the Germantown Transit Center that provides Ride On shuttle service to the Shady Grove red line.