46th Regiment

46th Regiment or 46th Infantry Regiment may refer to:


 * 46th (South Devonshire) Regiment of Foot, a unit of the United Kingdom Army
 * 46th (Liverpool Welsh) Royal Tank Regiment, a unit of the United Kingdom Army
 * 46th Infantry Regiment (United States), a unit of the United States Army


 * American Civil War regiments :


 * Union (Northern) Army regiments
 * 46th Illinois Volunteer Infantry Regiment
 * 46th Iowa Volunteer Infantry Regiment
 * 46th Wisconsin Volunteer Infantry Regiment


 * Confederate (Southern) Army regiments
 * 46th North Carolina Infantry Regiment