43rd Battalion

43rd Battalion may refer to:


 * 43rd (6th (City) Battalion, The Royal Northumberland Fusiliers) Royal Tank Regiment, a unit of the United Kingdom Army
 * 43rd Battalion Virginia Cavalry, also known as "Mosby's Rangers", a unit of the Confederate (Southern) Army during the American Civil War
 * 43rd Signal Battalion (United States), a unit of the United States Army