Great Falls is a city located in the Virginia region of the United States. During the most recent census, Great Falls had a population of 15,427. Great Falls is the 73rd most poplulated city in the Virginia region, the 2,782nd most populated city in the United States and the 16,302nd most populated city in the world. Great Falls is in the America/New York timezone which is 4 hours behind UTC. Great Falls adjusts the hour with daylight savings time during the winter months.
Great Falls is located near sea level (104 meters / 341 feet). The closest cities to Great Falls are Reston (5.6 km / 3.5 miles), Wolf Trap (6.5 km / 4.0 miles), Potomac (7.2 km / 4.5 miles), Travilah (8.2 km / 5.1 miles) and Sugarland Run (8.7 km / 5.4 miles)