USS O'Neill (DE-188) was a Cannon-class destroyer escort in service with the United States Navy from 1943 to 1946. In 1950, she was transferred to the Royal Netherlands Navy, where she served as Hr. Ms. Dubois (F809) until 1967. She was scrapped in 1968.

The Cannon class was a class of destroyer escorts built by the United States primarily for antisubmarine warfare and convoy escort service during World War II. The lead ship, USS Cannon, was commissioned on 26 September 1943 at Wilmington, Delaware. Of the 116 ships ordered, 44 were cancelled and six were commissioned directly into the Free French Forces. Destroyer escorts were regular companions escorting vulnerable cargo ships.