George Boardman Boomer (July 26, 1832 – May 22, 1863) was a Union Army colonel who served as a brigade commander between February 12, 1863 and May 22, 1863 during the American Civil War. His principal service was during the heavy engagement of his brigade on May 16, 1863 at the Battle of Champion Hill during the Vicksburg campaign and in the second assault on Vicksburg on May 22, 1863. Colonel Boomer was killed near the Railroad Redoubt on the second day of major assaults on the City of Vicksburg on May 22, 1863. He was commissioned Brigadier General around the time of his death.