Oak's Inn Military Reservation
Part of Harbor Defenses of Long Island Sound
Misquamicut, Rhode Island
A 155 mm gun, similar to those at Oak's Inn, on a Panama mount.
Coordinates	41°20′00″N 71°48′21″W / 41.33333°N 71.80583°W / 41.33333; -71.80583
Type	Coastal Defense
Site information
Owner	private
Controlled by	United States Army
Open to the public	no
Site history
Built	1942
Built by	United States Army
In use	1942–1944
Demolished	Panama Mounts and Officers Quarters razed 2008
Battles/wars	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.^[1]

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 inn was demolished in the 1950s and the Panama Mounts and Officers' Quarters were demolished in 2008 for a new housing development.

• Seacoast defense in the United States
• United States Army Coast Artillery Corps

• Berhow, Mark A., ed. (2015). American Seacoast Defenses, A Reference Guide (Third ed.). McLean, Virginia: CDSG Press. ISBN 978-0-9748167-3-9.
• Lewis, Emanuel Raymond (1979). Seacoast Fortifications of the United States. Annapolis: Leeward Publications. ISBN 978-0-929521-11-4.

• List of all US coastal forts and batteries at the Coast Defense Study Group, Inc. website
• FortWiki, lists most CONUS and Canadian forts
• Harbor Defenses of Long Island Sound at American Forts Network