Alacrity may refer to:
Alacrity (ship), various ships, including: Alacrity (1813 ship), a British merchant ship SS Alacrity (1893), a French tugboat used by the Royal Australian Navy during World War I HMS Alacrity, various Royal Navy ships USS Alacrity, several US Navy ships Operation Alacrity, a proposed World War II Allied occupation of the Azores in 1943
See also Alacrity 19, a British trailerable sailboat designed by Peter Stevenson Diligence Enthusiasm Speed