Five ships of the Royal Navy have been named HMS Halcyon. The term Halcyon originates from the Greek myth of Alcyone and means golden or marked by peace and prosperity.
- The first HMS Halcyon was the French 16-gun brig-sloop , which captured in 1803; Halcyon was broken up 1812.
- The second was an 18-gun launched in 1813 and wrecked the following year in Jamaica.
- The third was a in service from 1894 to 1919.
- The fourth was a paddle minesweeper in service from 1916 to 1921.
- The fifth was a . She was launched in 1933 and sold for scrapping in 1950.