Nikolaos "Nikos" Pettas (Greek: Νικόλαος "Νίκος" Πέττας; born February 28, 1981) is a Greek professional basketball player.

Pettas began playing basketball with the junior teams of Olympiacos.

With the senior men's team of Olympiacos, he played in the 1997 McDonald's Championship Final, against the Chicago Bulls.

He played in the European-wide 3rd-tier level FIBA EuroChallenge, during the 2007–08 season, with Olympias Patras.

Pettas was a member of the junior national teams of Greece.