Seven ships of the Royal Navy have been named HMS Cornwall after the Duchy of Cornwall. Cornwall's motto is onen hag oll (- Cornish), unus et omnes (- Latin), one and all - English).
HMS Cornwall was an 80-gun third-rate ship of the line launched in 1692 and broken up in 1761.
HMS Cornwall was a 74-gun third-rate launched in 1761. She was damaged in action in 1780, and subsequently burnt as unserviceable.
HMS Cornwall was the name initially chosen for HMS Heir Apparent, a 74-gun third rate captured from the Danish in 1807, but the name was not used.
HMS Cornwall was a 74-gun third-rate launched in 1812. She was reduced to 50 guns in 1831, was renamed HMS Wellesley in 1869 and served as a school ship until broken up in 1874.
HMS Cornwall was a 74-gun third rate launched in 1815 as HMS Wellesley. She was renamed HMS Cornwall in 1868 when she became a school ship, and was sunk in 1940.
HMS Cornwall was a Monmouth-class armoured cruiser launched in 1902 and sold in 1920.
HMS Cornwall was a County-class heavy cruiser launched in 1926 and sunk by Japanese air attack during the Indian Ocean raid in 1942.
HMS Cornwall was a Type 22 Batch 3 frigate launched in 1985 and decommissioned in June 2011.
