34th Regiment or 34th Infantry Regiment may refer to:
34th (Cumberland) Regiment of Foot, a unit of the United Kingdom Army 34 (Northern) Signal Regiment, a unit of the United Kingdom Army 34th Infantry Regiment (United States), a unit of the United States Army 34th Infantry Regiment (Greece)
American Civil War regiments 34th Regiment Indiana Infantry 34th Illinois Volunteer Infantry Regiment 34th Iowa Volunteer Infantry Regiment 34th Regiment Kentucky Volunteer Infantry 34th Ohio Infantry 34th Wisconsin Volunteer Infantry Regiment
See also 34th Division (disambiguation) 34th Brigade (disambiguation) 34th Squadron (disambiguation)