100th Brigade

100th Brigade may refer to:


 * 100th Brigade (United Kingdom)
 * 100th Indian Infantry Brigade
 * 100th Kazakh Rifle Brigade, Soviet Union
 * 100th Missile Defense Brigade, United States
 * 100th Reconnaissance Brigade, Russia
 * 100th Territorial Defense Brigade (Ukraine)
 * 100th Brigade (Wehrmacht)
 * 110th Separate Guards Motorized Rifle Brigade, Russia, known as the 100th Brigade before 2023