48th Regiment may refer to:
48th (Northamptonshire) Regiment of Foot 48th Arkansas Infantry (Mounted) 48th Artillery Regiment "Taro" 48th Highlanders of Canada 48th Illinois Infantry Regiment 48th Indiana Infantry Regiment 48th Infantry Regiment (United States) 48th Infantry Regiment "Ferrara" 48th Kentucky Mounted Infantry Regiment 48th Massachusetts Infantry Regiment 48th Mississippi Infantry Regiment 48th Ohio Infantry Regiment 48th Pennsylvania Infantry Regiment 48th United States Colored Infantry Regiment 48th Wisconsin Infantry Regiment