The Greek Rugby Union Championship is the most important domestic competition of rugby union in Greece.

It started in 2005 and is organised by Greek Rugby Federation.

[1] During the period that championships were held, the most titles were won by Athens RFC and one title was won by Attica Springboks RFC and one by Iraklis Rugby.

[1] The Hellenic Rugby Federation was abolished in 2014 due to the very low number of active clubs in the sport.

[2] and control of the sports development has since been handed over to the Hellenic Handball Federation which announced it would be setting up a development board with representatives of recognised clubs (currently Attica Springboks RFC, Athens Spartans RFC and Athens RFC) with a view to setting up a series of friendly matches between existing clubs until such time as enough teams exist so that an official championship can be set up.