Harry H. Gilbert (July 7, 1868 – December 23, 1909) was a Major League Baseball second baseman. He played in two games for the Pittsburgh Alleghenys of the National League on June 23, 1890. He started both ends of a doubleheader against the Philadelphia Phillies, collecting eight at bats with two hits. His brother, John Gilbert was his teammate with the Alleghenys. The Pittsburgh Alleghenies became the Pittsburgh Pirates.