Three ships of the Royal Navy have borne the name HMS Thalia, after Thalia, the name of a number of figures in Greek mythology, notably Thalia, one of the three Graces:

• HMS Thalia was a 36-gun fifth rate launched in 1782 as HMS Unicorn. She was renamed HMS Thalia in 1783 and was broken up in 1814.
• HMS Thalia (1830) was a 46-gun fifth rate launched in 1830 and broken up by 1867.
• HMS Thalia (1869) was a Juno-class wooden screw corvette launched in 1869. She was converted to a 10-gun troop ship in 1886, a powder hulk in 1891 and a base ship in 1915. She was sold in 1920.

This article includes a list of ships with the same or similar names. If an internal link for a specific ship led you here, you may wish to change the link to point directly to the intended ship article, if one exists.