49th Regiment

49th Regiment or 49th Infantry Regiment may refer to:


 * 49th Hutsul Rifle Regiment, a unit of the Polish Army
 * Royal Berkshire Regiment (49th Regiment of Foot), a unit of the United Kingdom Army
 * 49th Royal Tank Regiment, a unit of the United Kingdom Army


 * American Civil War regiments :
 * 49th Regiment Kentucky Volunteer Mounted Infantry, a unit of the Union (Northern) Army
 * 49th Illinois Volunteer Infantry Regiment, a unit of the Union (Northern) Army
 * 49th Wisconsin Volunteer Infantry Regiment, a unit of the Union (Northern) Army