George Bradley Kellogg (November 6, 1826 – November 12, 1875) was a Vermont military and political figure who served as Adjutant General of the Vermont Militia and a Lieutenant Colonel in the 1st Vermont Cavalry during the American Civil War.
George B. Kellogg was born in Rockingham, Vermont on November 6, 1825, the son of Adjutant General and Judge Daniel Kellogg. He studied law, was admitted to the bar, and practiced in Brattleboro.
Kellogg served in local offices, including Justice of the Peace. He also served as Windham County State's Attorney and a member of the Vermont House of Representatives.
He was Vermont's Adjutant General from 1854 to 1859.
In 1861 Kellogg was appointed Brattleboro's Deputy Postmaster.
At the start of the Civil War Kellogg accepted a commission to recruit troops for the volunteer regiments of the Union Army. He helped raised the 1st Vermont Cavalry Regiment and was appointed Lieutenant Colonel and second in command. Kellogg was the regiment's de facto commander and took part in several battles, but was unhappy at not receiving promotion to Colonel and command of the regiment after the resignation of Lemuel Platt, its first commander, and the death of Jonas P. Holliday, who had succeeded Platt. As a result he left the regiment, and was discharged in 1862.
After leaving the Army, Kellogg moved to St. Louis, where he reestablished his law practice. Later in the Civil War he was appointed a Major in the Missouri Militia and assigned to a unit ordered to perform home guard duties in and around St. Louis.