45th Regiment or 45th Infantry Regiment may refer to: __NOTOC__ 45th Rattray's Sikhs, a unit of the British Indian Army 45th (Leeds Rifles) Royal Tank Regiment, a unit of the British Army 45th Light Anti-Aircraft Regiment, Royal Artillery, a unit of the British Army 45th Garrison Regiment, Royal Artillery, a unit of the British Army 45th (Nottinghamshire) (Sherwood Foresters) Regiment of Foot, a unit of the British Army 45th Cavalry (India), a unit of the Indian Army 45th Infantry Regiment (Imperial Japanese Army) 45th Detached Reconnaissance Regiment, a special forces unit of the Russian Army 45th Infantry Regiment (United States), a unit of the United States Army

American Civil War regiments

Union Army regiments 45th Illinois Volunteer Infantry Regiment 45th Iowa Volunteer Infantry Regiment 45th New York Volunteer Infantry Regiment 45th Wisconsin Volunteer Infantry Regiment 45th Ohio Infantry 45th Regiment Kentucky Volunteer Mounted Infantry 45th Regiment Massachusetts Volunteer Infantry 45th United States Colored Infantry Regiment

Confederate Army regiments 45th Arkansas Infantry (Mounted) 45th North Carolina Infantry 45th Tennessee Infantry Regiment 45th Virginia Infantry

See also 45th Division (disambiguation) 45th Brigade (disambiguation) 45th Squadron (disambiguation)