Guillermo León Valencia Abdala
- Born July 26, 1926 in Aracataca, Magdalena Colombia
- Died December 26, 2016 in Cartagena, Bolívar Colombia
Guillermo Valencia was president of the Colombian Baseball Federation from 1973-1982 and managed the Colombian national team in the 1979 Pan American Games. Away from baseball, he had even bigger accomplishments. He was a thoracic surgeon who was dean of the medical school at the Universidad de Cartagena and also served as Governor of Magdalena.