The Battle of Lutter (German: Lutter am Barenberge) took place on 27 August 1626 during the Thirty Years' War, south of Salzgitter, in Lower Saxony. A combined Danish-German force led by Christian IV of Denmark was defeated by Johann Tserclaes, Count of Tilly, commanding an army of the Catholic League loyal to Emperor Ferdinand II.
Christian's campaign plan for 1626 consisted of three parts; while he led the main army against Tilly, Ernst von Mansfeld would attack Wallenstein, supported by Christian of Brunswick. In the event, Mansfeld was defeated at the Battle of Dessau Bridge in April, while Christian of Brunswick's attack failed completely and he died of disease in June.