61st Regiment or 61st Infantry Regiment may refer to:
61st Regiment of Foot (disambiguation), four British Army units carried this name 61st Pioneers, a unit of the British Indian Army, 1758-1922 61st Infantry Regiment (United States), a unit of the United States Army 61st Air Defense Artillery Regiment, a unit of the United States Army 61st Cavalry Regiment (United States), a unit of the United States Army 61st Anti-aircraft Missiles Regiment (Romania), a unit of the Romanian Land Forces 61st Cavalry (India), a unit of the Indian Army 61st Infantry Regiment (Finland), a unit of the Finnish Army, 1941–1944
American Civil War Union (Northern) Army 61st Illinois Volunteer Infantry Regiment 61st Indiana Infantry Regiment 61st Ohio Infantry 61st New York Volunteer Infantry 61st Regiment Massachusetts Volunteer Infantry 61st Pennsylvania Infantry
Confederate (Southern) Army 61st Virginia Infantry 61st Georgia Volunteer Infantry
See also 61st Infantry Regiment (disambiguation)