RFA Fort Rosalie was the lead ship of her class of Royal Fleet Auxiliary fleet replenishment ships. Fort Rosalie was originally named RFA Fort Grange, but was renamed in May 2000 to avoid confusion with the now-decommissioned RFA Fort George. On 31 March 2021, the ship was withdrawn from service.

The Fort Rosalie or Fort class of fleet replenishment vessel of the British Royal Fleet Auxiliary were designed to replenish Royal Navy taskgroups with various armaments and victualling stores while under way. Unlike the bigger Fort Victoria class, they supply dry stores and not fuel. RFA Fort Rosalie was originally known as Fort Grange but was renamed in 2000 to avoid confusion with the new Fort Victoria-class replenishment oiler RFA Fort George. Both ships were withdrawn from service and later sold in 2021.