Three ships of the Royal Fleet Auxiliary have borne the name RFA Reliant:
- was a stores carrier, formerly the civilian London Importer. She was acquired in 1933 and sold in 1948.
- was an air stores support ship, formerly the civilian Somersby. She was acquired in 1957 and scrapped in 1977.
- was a helicopter support ship, formerly the civilian Astronomer. She was acquired in 1983 and sold in 1986.