Charles Gray Catto (7 November 1896 – 24 June 1972) was an American pursuit pilot and a flying ace in World War I.

Prior to World War I, he attended the University of Edinburgh, Scotland as a medical student.

He completed his flight training in England and left for Italy to join 45 Squadron, flying Sopwith Camels.

He claimed six enemy aircraft, one of which fell inside Allied lines, piloted by Flieger Alois Gnamusch and Leutnant Rudolph Hess.

[1] After the war, Catto continued his medical studies at the University of Edinburgh and graduated in 1922.