18th Brigade

18th Brigade may refer to:

Australia

 * 18th Brigade (Australia)

United Kingdom

 * 18th Infantry Brigade (United Kingdom)
 * 18th Mounted Brigade (United Kingdom)
 * Artillery Brigades
 * 18th Brigade Royal Field Artillery
 * XVIII Brigade, Royal Horse Artillery (T.F.)

United States

 * 18th Aviation Brigade (United States)
 * 18th Engineer Brigade (United States)
 * 18th Fires Brigade (United States)
 * 18th Military Police Brigade (United States)

Yugoslavia

 * 18th (Croatian) Eastern Bosnian Brigade, an irregular formation of Yugoslav partisans which opposed German forces during World War II