It was named for Thomas Williams, killed at Baton Rouge, on August 5, 1862.

Built in the weeks following the Union defeat at Bull Run, Fort Williams was situated on north of Hunting Creek and Cameron Run, (which feeds into it), near Vaucluse.

From its position on Quaker Lane, one of the points west of Alexandria, the fort overlooked the Orange and Alexandria Railroad, the Little River Turnpike, and the western approaches to the city of Alexandria, the largest settlement in Union-occupied Northern Virginia.

It was built by the 2nd Connecticut Heavy Artillery Regiment.
It had a perimeter of 250 yards, and space for 13 guns.

The Fort is now located in the backyard of a property in the Seminary Ridge neighborhood.
Portions are also included in a 7.80 acres (31,600 m²) Alexandria, Virginia city park, at 501 Fort Williams Parkway.

Among those stationed at the fort during the war was George Tryon Harding, father of Warren G. Harding, who spent time there in 1864.
It was named for Thomas Williams, killed at Baton Rouge, on August 5, 1862.
Built in the weeks following the Union defeat at Bull Run, Fort Williams was situated on north of Hunting Creek and Cameron Run, (which feeds into it), near Vaucluse. 
From its position on Quaker Lane, one of the points west of Alexandria, the fort overlooked the Orange and Alexandria Railroad, the Little River Turnpike, and the western approaches to the city of Alexandria, the largest settlement in Union-occupied Northern Virginia.
It was built by the 2nd Connecticut Heavy Artillery Regiment. It had a perimeter of 250 yards, and space for 13 guns.
The Fort is now located in the backyard of a property in the Seminary Ridge neighborhood. Portions are also included in a 7.80 acres (31,600 m²) Alexandria, Virginia city park, at 501 Fort Williams Parkway.
Among those stationed at the fort during the war was George Tryon Harding, father of Warren G. Harding, who spent time there in 1864.
Fort Williams (Virginia)