Adrian Rowe Root (May 6, 1832 – June 4, 1899) was an American commission merchant, warehouse executive, newspaper editor and military officer in the Union Army during the American Civil War.
He served as brigade commander for much of the war but his highest actual substantive grade was colonel.
His March 2, 1865 nomination for appointment as brevet brigadier general of volunteers to rank from March 2, 1865, was confirmed by the United States Senate on March 9, 1865.
His January 13, 1866 nomination for appointment as a brevet major general of volunteers, to rank from March 13, 1865, was confirmed by the U.S.