78th Brigade may refer to:
Soviet Union 78th Tank Brigade
Ukraine 78th Airborne Assault Brigade
United Kingdom 78th Brigade (United Kingdom), British Army infantry formation during World War I 78th (Howitzer) Brigade, Royal Field Artillery, British Army unit during World War I 78th (Lowland) Brigade, Royal Field Artillery, British Army unit after World War I
See also 78th Division (disambiguation) 78th Regiment (disambiguation)