Leesburg is a historic town in and county seat of Loudoun County, Virginia, United States of America. Located approximately 40 miles west-northwest of Washington, D.C. along the base of the Catoctin Mountain adjacent to the Potomac River.

Leesburg is the northwestern terminus of the Dulles Greenway (a private toll road which connects to the Dulles Toll Road at Washington Dulles International Airport), it is largely a bedroom community for commuters to the national capital.

Current growth of the town and its immediate area (Ashburn, Virginia) concentrates along the Dulles Greenway, and along the Leesburg Pike (State Route 7), which roughly parallels the Potomac River between Winchester to the west and Alexandria to the east.

• Population: 28,311
• Geographic Size: 30.0 km² (11.6 mi²), all land.
• County: Loudoun
• School information
• Utility companies
• County assessment page