Several Royal Navy ships have been named HMS Diamond.
- HMS Diamond (1652), a 50-gun ship launched at Deptford in 1652 and captured by France in 1693.
- HMS Diamond (1708), a fifth-rate 50 gun ship launched at Blackwall Yard in 1708 and rebuilt at Deptford Dockyard in 1722, sold in 1744.
- HMS Diamond (1741), a fifth-rate launched at Limehouse in 1741 and sold in 1756.
- HMS Diamond (1774), a fifth-rate launched at Hull in 1774 and sold in 1784.
- HMS Diamond (1794), a fifth-rate launched at Deptford in 1794 and broken up in 1812.
- HMS Diamond (1816), a fifth-rate launched at Chatham in 1816 and broken up following a serious fire at Portsmouth in 1827.
- HMS Diamond (1848), a sixth-rate frigate launched in 1848. She was used as a training ship and renamed Joseph Straker between 1866 and 1868, and sold in 1885.
- HMS Diamond (1874), a 14-gun Amethyst-class corvette launched in 1874 and sold in 1889.
- HMS Diamond (1904), a Topaze-class cruiser built by Cammell Laird, launched in 1904 and scrapped in 1921
- HMS Diamond (H22), a D-class destroyer launched in 1931 and lost in action in 1941.
- HMS Diamond (D35), a Daring-class destroyer launched in 1950 and sold in 1980.
- HMS Diamond (D34), a Type 45 destroyer which began construction in 2005 and was launched on 27 November 2007.
Ships named Diamond have earned the following battle honours:
- Colledge, J. J.; Warlow, Ben (2006) . Ships of the Royal Navy: The Complete Record of all Fighting Ships of the Royal Navy (Rev. ed.). London: Chatham Publishing. ISBN 978-1-86176-281-8.