43 may refer to:
* 43 (number)
* one of the years 43 BC, AD 43, 1943, 2043
* Licor 43, also known as "Cuarenta Y Tres" ("Forty-three" in Spanish)
* George W. Bush, 43rd President of the United States, nicknamed "Bush 43" to distinguish from his father
* "Forty Three", a song by Karma to Burn from the album ''Appalachian Incantation'', 2010
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