Three ships of the Royal Navy and Royal Fleet Auxiliary have been named Sir Galahad for the perfect knight of Arthurian legend.

• The first HMS Sir Galahad was a Round Table class trawler used as a minesweeper in World War II.
• The second RFA Sir Galahad (L3005), a landing ship (logistic), was lost in the Falklands War.
• The third RFA Sir Galahad (L3005), a landing ship (logistic) named for (and given the same pennant number as) the previous Galahad, was involved in the 2003 invasion of Iraq.