115th Regiment may refer to:

115th Regiment of Foot (disambiguation), British Army regiments 115th Infantry Regiment (Imperial Japanese Army) 115th Infantry Regiment (United States) 115th (North Midland) Field Regiment, Royal Artillery 115th Light Anti-Aircraft Regiment, Royal Artillery

American Civil War regiments 115th Indiana Infantry Regiment 115th Illinois Infantry Regiment 115th New York Infantry Regiment 115th Ohio Infantry Regiment 115th Pennsylvania Infantry Regiment

See also 115th Brigade (disambiguation) 115th Division (disambiguation)