| Fort Mansfield | |
|---|---|
| Part of Harbor Defenses of Long Island Sound | |
| Napatree Point, Westerly, Rhode Island | |
 The remains of Fort Mansfield on Napatree Point. | |
  Fort Mansfield Location in Rhode Island | |
| Coordinates | 41°18′23″N 71°53′05″W / 41.30639°N 71.88472°W |
| Type | Coastal Defense |
| Site information | |
| Owner | State of Rhode Island, public beach |
| Controlled by | Town of Westerly |
| Open to the public | yes |
| Site history | |
| Built | 1901 |
| Built by | United States Army |
| In use | 1901-1926 |
| Battles/wars | none |
Fort Mansfield was a coastal artillery installation located on Napatree Point, a long barrier beach in the village of Watch Hill in Westerly, Rhode Island.