Robert Henry "Harry" Lochhead (March 29, 1876 – August 22, 1909), sometimes spelled "Lockhead", was an American baseball shortstop. A native of Stockton, California, he played professional baseball from 1896 to 1903, including two years in Major League Baseball with the Cleveland Spiders in 1899 and the Detroit Tigers and Philadelphia Athletics in 1901. He compiled a .231 batting average in 158 major league games. He ranked second in the National League with 81 errors in 146 games at shortstop during the 1899 season.