150th Regiment may refer to:
150th Aviation Regiment (United States) 150th Cavalry Regiment, United States 150th Field Artillery Regiment, United States 150th Fighter-Bomber Aviation Regiment, Yugoslav Air Force 150th Infantry Regiment (France) 150th (The Loyals) Light Anti-Aircraft Regiment, Royal Artillery 150th (South Nottinghamshire Hussars) Regiment, Royal Horse Artillery 150 Regiment RLC, United Kingdom Territorial Army
American Civil War regiments 150th Illinois Infantry Regiment 150th Indiana Infantry Regiment 150th New York Infantry Regiment 150th Ohio Infantry Regiment 150th Pennsylvania Infantry Regiment