United States
Name: Sentinel
Builder: Defoe Shipbuilding Co., Bay City, Michigan
Fate: Contract cancelled, 12 August 1945
General characteristics (as designed)
Displacement: 625 long tons (635 t)
Length: 184 ft 6 in (56.24 m)
Beam: 33 ft (10 m)
Draft: 10 ft (3.0 m)
Speed: 15 knots (28 km/h; 17 mph)
Complement: 104 officers and men

USS Sentinel (AM-412) was a steel-hulled fleet (oceangoing) minesweeper of the Admirable class planned for the United States Navy. She was a part of a group of minesweepers scheduled to be built as replacements and for Lend-Lease commitments. On 12 August 1945, three days before hostilities ceased in the Pacific, the U.S. Navy cancelled its contract with the Defoe Shipbuilding Co., Bay City, Michigan, for the construction of Sentinel.