Toliopoulos played at the 2012 FIBA Europe Under-16 Championship, the 2013 FIBA Europe Under-18 Championship, and the 2014 FIBA Europe Under-18 Championship with the junior national teams of Greece. He also played at the 2015 FIBA Under-19 World Cup, and the 2nd division 2016 FIBA Europe Under-20 Championship Division B, where he won a bronze medal.