Nine ships of the Royal Navy have been named HMS Alacrity:
HMS Alacrity (1806) was an 18-gun Cruizer class brig-sloop launched in 1806 and captured by the French in 1811.
HMS Alacrity (1818) was a 10-gun Cherokee class brig-sloop launched in 1818 and sold in 1835.
HMS Alacrity (1856) was a wooden screw sloop launched in 1856 and sold in 1864.
HMS Alacrity (1872) was the former civilian vessel Ethel, purchased in 1872 and sold in 1882.
HMS Alacrity (1885) was a Surprise class third class cruiser, launched in 1885 and sold in 1913.
HMS Alacrity (1919) was a yacht and despatch vessel launched as the Margarita, but renamed Seramis in 1913. She was requisitioned as an armed boarding vessel in 1918 and renamed Mlada, and commissioned in 1919 as HMS Alacrity. She was paid off in 1922, sold in 1923 and struck from Lloyd's Register in 1939.
HMS Alacrity (U60) was a Modified Black Swan-class sloop launched in 1944 and broken up in 1956.
HMS Alacrity (F174) was a Type 21 frigate launched in 1974. She served in the Falklands War and was sold to Pakistan in 1994 and renamed Badr.
