43

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
 * 43 Ariadne, a main-belt asteroid