56th Regiment

• 56th (King's Own) Anti-Tank Regiment, Royal Artillery
• 56th (West Essex) Regiment of Foot
• 56th Air Defense Artillery Regiment
• 56th Brigade (disambiguation)
• 56th Division (disambiguation)
• 56th Field Artillery Regiment, RCA
• 56th Group (disambiguation)
• 56th Illinois Volunteer Infantry Regiment
• 56th Infantry Regiment (United States)
• 56th New York Volunteer Infantry
• 56th North Carolina Infantry
• 56th Ohio Infantry
• 56th Pennsylvania Infantry
• 56th Punjabi Rifles (Frontier Force)
• 56th Regiment Indiana Infantry
• 56th Squadron (disambiguation)
• 56th United States Colored Infantry
• 56th Virginia Infantry
• British Army
• British Indian Army
• Canadian Army
• United States Army