Three ships of the Royal Navy have borne the name HMS Acasta, whilst another two were planned:
was a 40-gun fifth rate frigate launched in 1797 and broken up in 1821. HMS Acasta was to have been a wooden screw frigate. She was laid down in 1861 but was cancelled in 1863. was an launched in 1912 and sold for scrap in 1921. was an A-class destroyer launched in 1929. She was sunk in 1940 by the German battleships and . HMS Acasta (P452) was to have been an , but was cancelled in 1945.
References p. 2.