Nikolaos (Nikos) Chatzivrettas (alternate spelling: Hatzivrettas) (Greek: Νικόλαος (Νίκος) Χατζηβρέττας; born May 26, 1977) is a retired Greek professional basketball player.

At a height of Chatzivrettas 1.97 m (6 ft 5 3⁄4 in) tall, he played at the shooting guard and small forward positions.

[1] Before signing with Aris, Chatzivrettas played with Aias Evosmou, Iraklis, CSKA Moscow, and Panathinaikos.

In July 2009, he joined "The Emperor" of Greek basketball, Aris Thessaloniki.

Chatzivrettas was a member of the senior Greece men's national basketball team.