Union Units Which Participated in the Siege of Petersburg
- Union Infantry
- Connecticut Infantry
- Delaware Infantry
- Illinois Infantry
- Indiana Infantry
- Iowa Infantry
- Maine Infantry
- Maryland Infantry (US)
- Massachusetts Infantry
- Michigan Infantry
- Minnesota Infantry
- New Hampshire Infantry
- New Jersey Infantry
- New York Infantry
- Ohio Infantry
- Pennsylvania Infantry
- Rhode Island Infantry
- United States Regular Infantry
- United States Volunteer Infantry
- Vermont Infantry
- West Virginia Infantry
- Wisconsin Infantry
- Union Cavalry
- Connecticut Cavalry
- District of Columbia Cavalry
- Indiana Cavalry
- Maine Cavalry
- Maryland Cavalry (US)
- Massachusetts Cavalry
- Michigan Cavalry
- New Hampshire Cavalry
- New Jersey Cavalry
- New York Cavalry
- Ohio Cavalry
- Pennsylvania Cavalry
- Rhode Island Cavalry
- United States Regular Cavalry
- Vermont Cavalry
- West Virginia Cavalry
- Union Artillery
- Union Navy
- Union Civilian Vessels