Giorgos Kalafatis (Greek: Γιώργος Καλαφάτης; 17 March 1890 – 19 February 1964)[1] was a Greek football pioneer, player, coach, track and field athlete and the founder of Panathinaikos Athens multi-sports club.

Athens and when his later club Panellinios decided to discontinue its football team, Kalafatis together with 40 other athletes broke away and established in February 1908 the first team of Panathinaikos, named Podosfairikos Omilos Athinon (Football Club of Athens).

Apart from Giorgos Kalafatis, other establishing members of POA were: his brother Alexandros, who was the first president, Emmanouel Chrysis, Dimitris Doukakis, Periklis Mpoumpoulis, Vasileios Granitsas, Mantzakos, Papageorgiou, Gaetas, Demertzis, Stavropoulos, Paschos, Misakian, Reppas, Sapounias and Garoufalias.

In Paris, Kalafatis collected information about basketball and volleyball (sports unknown then in Greece) and after his return to Athens, started his efforts on creating new teams with Panathinaikos.

[4] His older brother, Alexandros, was selected for the unofficial Greece national team that played in the 1906 Summer Olympics in Athens, starting in both games which ended in 1–5 and 0–9 losses.