This is a list of regiments from the U.S. state of Louisiana that fought in the Union Army during the American Civil War (1861–1865). The list of Louisiana Confederate Civil War units is shown separately.

• 1st Louisiana Regiment Heavy Artillery (African Descent)
• 1st Louisiana Battery Light Artillery (African Descent)
• 2nd Louisiana Battery Light Artillery (African Descent)
• 3rd Louisiana Battery Light Artillery (African Descent)

• 1st Louisiana Regiment Cavalry
• 2nd Louisiana Regiment Cavalry

• 1st Louisiana Regiment Infantry
• 1st Louisiana Regiment New Orleans Infantry
• 2nd Louisiana Regiment Infantry
• 2nd Louisiana Regiment New Orleans Infantry
• 1st Louisiana Regiment Native Guard Infantry
• 2nd Louisiana Regiment Native Guard Infantry
• 3rd Louisiana Regiment Native Guard Infantry
• 4th Louisiana Regiment Native Guard Infantry
• 5th Louisiana Regiment Infantry (African Descent)
• 6th Louisiana Regiment Infantry (African Descent)
• 7th Louisiana Regiment Infantry (African Descent)
• 8th Louisiana Regiment Infantry (African Descent)
• 9th Louisiana Regiment Infantry (African Descent)
• 10th Louisiana Regiment Infantry (African Descent)
• 11th Louisiana Regiment Infantry (African Descent)
• 12th Louisiana Regiment Infantry (African Descent)

• Lists of American Civil War Regiments by State
• Southern Unionists
• United States Colored Troops

• Dyer, Frederick Henry (1908). Compendium of the War of the Rebellion: Regimental Histories. New York: T. Yoseloff.

• The Civil War Archive, Union Regimental Index
• National Park Service Civil War Soldiers and Sailors Website