Ansel Dyer Wass (November 12, 1832 – January 24, 1889) was an American Union brevet brigadier general during the period of the American Civil War. He was severely wounded during Pickett's Charge. On October 14, 1863, he led a brigade at the Battle of Bristoe Station. He also led the 60th Regiment Massachusetts Volunteer Infantry in Maryland to guard the railroad lines. He received his appointment as brevet brigadier general dated to March 13, 1865.