Theodore Harvey Barrett (1834-1900) was an American Brevet Brigadier General who commanded the 1st Missouri Colored Infantry Regiment in the later years of the American Civil War and was known as the commander of the Battle of Palmito Ranch which was the final battle of the war.

Barrett enlisted on September 15, 1862, as a 2nd Lieutenant of the 9th Minnesota Infantry Regiment at Company G but wouldn't see active service as the 9th Minnesota was organized to engage in skirmish with Native American tribes.

Barrett was brevetted Brigadier General on March 13, 1865, for "faithful and meritorious services".

He then organized a unofficial truce with the Confederates there around March until Barrett dispatched the 1st Missouri, the 34th Indiana and the 2nd Texas to raid a Confederate camp near Fort Brown but were driven back after some Mexican witnesses reported them to the Confederates due to a few skirmishes between them and the Union forces.

[1][4] Barrett was then discharged on January 19, 1866, and returned to Herman, Minnesota where he died on July 20, 1900, and was buried at Riverside Cemetery, Sterling, Illinois.