15th Brigade

15th Brigade or 15th Infantry Brigade may refer to:
 * 15th Brigade (Australia)
 * 15th Mechanized Brigade (Romania)
 * 15th Infantry Brigade (Greece)
 * 15th Brigade (Japan)
 * 15th (Imperial Service) Cavalry Brigade
 * 15th Mounted Brigade (United Kingdom)
 * 15th Infantry Brigade (United Kingdom)
 * 15th Sustainment Brigade (United States)