Panagiotis Liadelis (born December 7, 1974, in Volos, Greece) is a retired Greek professional basketball player.

He also played for the Greek clubs PAOK Thessaloniki, Makedonikos, Olympiacos Piraeus, and Apollon Patras.

In all of those years, he was an efficient scorer in the Greek League and the EuroLeague, when he participated in the competition.

In 2006, he moved to Azovmash Mariupol, and in the 2006–07 season, he was a finalist in the FIBA EuroCup, against Girona.

Liadelis was also a member of the senior men's Greek national team.