20th Brigade

20th Brigade may refer to:

Infantry units

 * 20th Brigade (Australia)
 * 20th Indian Brigade, a unit of the British Indian Army in World War I
 * 20th Indian Infantry Brigade, a unit of the British Indian Army in World War II
 * 20th Brigade (United Kingdom)
 * 20th Armoured Infantry Brigade (United Kingdom)
 * 20th Independent Infantry Brigade (Guards), United Kingdom

Other units

 * 20th Mounted Brigade, United Kingdom
 * XX Brigade, Royal Horse Artillery (T.F.), Territorial Force, United Kingdom
 * 20th Engineer Brigade (United States)