Five ships of the Royal Navy have borne the name HMS Sentinel:
was a 12-gun brig, formerly named Friendship. She was purchased in 1804 and wrecked in the Baltic in 1812. was a scout cruiser launched in 1904 and sold in 1923. HMS Sentinel was an S-class destroyer, renamed before being launched in 1942. was an S-class submarine launched in 1945 and scrapped in 1962. was a patrol vessel purchased in 1983. She was previously named Seaforth Warrior and Edda Sun. She was commissioned in 1984 and paid off in 1992. She was sold in 1993.