| Oak's Inn Military Reservation | |
| Partof: | Harbor Defenses of Long Island Sound |
| Location: | Misquamicut, Rhode Island |
| Coordinates: | 41.3333°N -71.8058°W |
| Type: | Coastal Defense |
| Built: | 1942 |
| Builder: | United States Army |
| Used: | 1942–1944 |
| Demolished: | circa 1990s |
| Ownership: | private |
| Open To Public: | no |
| Controlledby: | United States Army |
| Battles: | World War II |
Oak's Inn Military Reservation was a coastal defense site located in Misquamicut, Rhode Island in the town of Westerly, overlooking Misquamicut State Beach. It was part of the Harbor Defenses of Long Island Sound. Today, the site is a residential development.
Oak's Inn Military Reservation was built adjacent to the inn of the same name in 1942. The site had four "Panama mounts" (circular concrete platforms) for four towed 155 mm (6.1 inch) guns. A battery of two 16-inch (406 mm) guns (Battery Construction Number 114) was proposed for this location but not built. The reservation was deactivated in 1944.[1] [2]
The site and the adjacent inn of the same name were demolished for residential development by the 2000s, with no remaining structures.