The 55th United States Colored Infantry Regiment was a United States Colored Troops infantry regiment in the Union Army during the American Civil War. It was first organized as the 1st Alabama Volunteer Infantry Regiment (African Descent) in May 1863, serving on garrison duty at Corinth, Mississippi and Memphis, Tennessee. It was redesignated as the 55th United States Colored Infantry in March 1864, continuing its garrison service in Tennessee and fighting at the Battle of Brices Cross Roads. After the end of the war, the regiment was mustered out in late 1865 after garrison duty in Louisiana.