Two ships of the Royal Navy have borne the name HMS Pathfinder.
- , launched in 1904, was a scout cruiser, the lead ship of her class. She was sunk at the start of World War I by , becoming the first ship to ever be sunk by a torpedo fired by submarine.
- , launched in 1941, was a P-class destroyer. She served in World War II, sank the German submarines and , and was rendered a constructive loss by air attack off Ramree Island, Burma on 11 February 1945, she was finally broken up at Milford Haven in November 1948.