Blackthorn or sloe is Prunus spinosa, a species of Prunus native to Europe, western Asia, and locally in northwest Africa.

Other plant species also named 'blackthorn' are: Australian blackthorn (Bursaria spinosa), a small shrub in the family Pittosporaceae Blackthorn or black-thorn acacia (Senegalia mellifera) of the Afrotropics and Arabia

Blackthorn may also refer to:

Blackthorn (American band), an American Celtic rock band Blackthorn (character), character in Marvel Comics Blackthorn (film), a 2011 Western film directed by Spanish director Mateo Gil Blackthorn (musician), Norwegian metal musician Blackthorn (Russian band), a Russian symphonic extreme metal band Blackthorn, Oxfordshire, England Blackthorn railway station, Oxfordshire, England Blackthorn Cider, a processed commercial cider Blackthorn Trust, a British charity Lord Blackthorn, a recurring character in the Ultima game series USCGC Blackthorn (WLB-291), a United States Coast Guard ship Blackthorn City, a town in the Pokémon games universe; see A British tag game from the 19th century; see Blackthorn (cocktail)

See also Black Thorn (disambiguation) Blackthorne (disambiguation)