101st Regiment may refer to:

Infantry regiments 101st Regiment of Foot (disambiguation), several units of the British Army 101st Grenadiers, a unit of the army of British India 101st (Northumbrian) Regiment Royal Artillery, a unit of the British Army 101st Infantry Regiment (PA), a unit of the Philippine Commonwealth Army 101st Infantry Regiment (United States) 101st Regiment "Edmonton Fusiliers", a unit of Canada's Non-Permanent Active Militia from 1908 to 1920

Armoured regiments 101 Panzer Regiment, a unit of the Führer Grenadier Brigade of the German Army

Aviation regiments 101st Aviation Regiment, US Army 101st Fighter-Training Aviation Regiment, a unit of the Yugoslav Air Force

Cavalry regiments 101st Cavalry Regiment, a unit of the New York Army National Guard, US Army

Artillery regiments 101st Field Artillery Regiment, a unit of the US Army 101st Field Artillery Regiment (PA), a unit of the Philippine Commonwealth Army 101st (Northumbrian) Regiment Royal Artillery 101st Heavy Anti-Aircraft Regiment, Royal Artillery 101st Light Anti-Aircraft Regiment, Royal Artillery

American Civil War regiments 101st Illinois Infantry Regiment 101st Indiana Infantry Regiment 101st New York Infantry Regiment 101st Ohio Infantry Regiment 101st United States Colored Infantry Regiment

Other 101st Communications Regiment (Ukraine)

See also 101st Squadron (disambiguation) 101st Battalion (disambiguation) 101st Brigade (disambiguation) 101st Division (disambiguation)