Nikolaos "Nikos" Smaragdis (Greek: Νικόλαος «Νίκος» Σμαραγδής; born (1982-02-12)12 February 1982) is a Greek male volleyball player.

He has been 195 times capped with Greece national team.

Smaragdis has won 10 times the Hellenic Championship.

He is also the only Greek Volleyball player who achieved it, with four clubs.

Smaragdis was part of the Greece men's national volleyball team at the 2006 FIVB Volleyball Men's World Championship in Japan.