Potomac Falls is an unincorporated located in Loudoun County. Potomac Falls is along the Potomac River and is in the northern portion of Sterling with the ZIP code of 20165, bordering Maryland.
Communities within Potomac Falls are Glen Heather, Calvert's Glen, Cascades, CountrySide, Lowes Island, Rivercrest, Potomac Hunt, Great Falls Forest and Great Falls Chase. (Great Falls Forest was first considered a part of Fairfax County; however, when an additional part of the neighborhood was added, it was switched to Loudoun County. Great Falls Chase, is also previously known as Great Falls Forest. Development of Potomac Falls began in the late 1980s
The name for Potomac Falls came from a competition to name the second new Post Office in Sterling. Also called Potomac Falls or Sterling, Great Falls Chase, is also a new addition to what was previously known as Great Falls Forest
Development of Potomac Falls began in the late 1980s, Potomac Falls borders Great Falls and Fairfax County to the southeast and has several shopping areas, schools, and community centers. Potomac Falls is also home to three golf courses.
It is located northwest of Herndon, east of Ashburn, and west of Great Falls, and includes part of Dulles International Airport