- Source: Ioannis Papadiamantopoulos
Ioannis Papadiamantopoulos (Greek: Ιωάννης Παπαδιαμαντόπουλος) may refer to:
Ioannis Papadiamantopoulos (1766–1826), Greek revolutionary leader
Ioannis Papadiamantopoulos (major general), Greek officer
Jean Moréas (born Ioannis A. Papadiamantopoulos), poet