Konstantinos Vasileiou

Konstantinos Vasileiou (Patras, 1992) is a Greek international water polo referee, who has officiated in European and international competitions under the auspices of World Aquatics and European Aquatics.

Biography

Vasileiou was born and grew up in Patras, Greece.

Vasileiou has officiated in a wide range of domestic and international competitions, including matches organized by European Aquatics and World Aquatics. He has been appointed to referee games in major European club competitions such as the LEN Champions League and the LEN Euro Cup, as well as international matches involving national teams.

At national level, he has officiated top-tier matches in the Greek A1 Ethniki championship and domestic finals under the authority of the Hellenic Swimming Federation. As part of the international refereeing pool, Vasileiou has been selected for tournaments organized by World Aquatics, contributing to officiating at a competitive level.

In April 2026, he was selected to officiate games -among the world top 8 teams (Division 1)- at the 2026 FINA Men's Water Polo World Cup tournament.