Fort Loudoun, Archaeological site in Winchester, United States.

Fort Loudoun is an archaeological site in Winchester showing the remains of a British military installation with rectangular earthen ramparts and wooden stockade structures from colonial times. Excavations have revealed foundations, artifacts, and evidence of buildings that demonstrate how the fort was organized and used.

Fort Loudoun was built between 1756 and 1758, after Edward Braddock's defeat left the Virginia frontier open to attacks from the Fort Duquesne region. Colonel George Washington moved his headquarters to Winchester and supervised construction, running a recruitment campaign for the Virginia militia. The fort was named for John Campbell, 4th Earl of Loudoun, then commander of British forces in North America. Washington and his regiment were headquartered there for two years.

The fort's name honours John Campbell, 4th Earl of Loudoun, who commanded British forces in North America for a time during the war. The surviving property at 419 North Loudoun holds the fort's historic heart, including a well dug during construction and part of the northwest bastion. The non-profit French and Indian War Foundation now owns the site.

The site is accessible for visitors to walk around and observe the visible earthworks and archaeological remains from different angles. Interpretive signs and guided tours provide context about the fort's layout and the findings from excavations.

The surviving trace of the fort is easy to miss: at 419 North Loudoun, a well dug during the fort's construction and part of its northwest bastion remain, now owned by the non-profit French and Indian War Foundation.