43rd Regiment

43rd Regiment or 43rd Infantry Regiment may refer to:


 * 43rd Erinpura Regiment, a unit of the British Indian Army
 * 43rd Infantry Regiment (France), a unit of the French Army
 * 43rd Infantry Regiment (Philippine Commonwealth Army), a unit of the Philippine Commonwealth Army
 * 43rd (Monmouthshire) Regiment of Foot, a unit of the United Kingdom Army
 * 43rd (6th (City) Battalion, The Royal Northumberland Fusiliers) Royal Tank Regiment, a unit of the United Kingdom Army
 * 43rd Infantry Regiment (United States), a unit of the United States Army
 * 43rd Bomber Aviation Regiment, a aviation unit of the Yugoslav Air Force


 * American Civil War regiments :
 * 43rd Illinois Volunteer Infantry Regiment, a unit of the Union (North) Army during the American Civil War
 * 43rd Wisconsin Volunteer Infantry Regiment, a unit of the Union (North) Army during the American Civil War