78th Regiment or 78th Infantry Regiment may refer to:
78th Regiment of Foot (disambiguation), several units of the British Army 78th Moplah Rifles, a regiment of the British Indian Army 78th Infantry Regiment (Imperial Japanese Army) 78th Independent Infantry Regiment (North Korea) 78th Field Artillery Regiment, a unit of the US Army
American Civil War:
78th Illinois Infantry Regiment, a unit of the Union (Northern) Army 78th Indiana Infantry Regiment, a unit of the Union (Northern) Army 78th New York Infantry Regiment, a unit of the Union (Northern) Army and nicknamed the 78th Highlanders in reference to the British units 78th Ohio Infantry Regiment, a unit of the Union (Northern) Army 78th Pennsylvania Infantry Regiment, a unit of the Union (Northern) Army
See also 78th Division (disambiguation) 78 Squadron (disambiguation)