| Fort Willard | |
|---|---|
| Part of the Civil War defenses of Washington, D.C. | |
| Fairfax County, Virginia, USA | |
 Entrance to Fort Willard | |
| Type | Earthwork fort |
| Site information | |
| Owner | Fairfax County Park Authority |
| Controlled by | Union Army |
| Open to the public | Yes |
| Condition | Stabilized |
| Site history | |
| Built | 1862–1863 |
| Built by | 34th Massachusetts Volunteer Infantry |
| In use | 1862–1865 |
| Materials | Earth, timber |
| Demolished | 1865 |
| Battles/wars | American Civil War |
Fort Willard is a former Union Army installation now located in the Belle Haven area of Fairfax County in the U.S. state of Virginia. It is currently undergoing preservation treatment to protect its earthen walls and trenches.