Konstantinos "Kostas" Missas (alternate spelling: Constandinos, Costas) (Greek: Κωνσταντίνος "Κώστας" Μίσσας; born August 15, 1953, in Greece) is a Greek former professional basketball player, and current professional basketball coach.

He also coached the Greece men's national basketball team at the 2017 FIBA EuroBasket.

Missas played with Greek junior national team at the 1972 FIBA Europe Under-18 Championship.

In June 2017, he became the head coach of the Greece men's national basketball team.

[4][5] He coached Greece at the EuroBasket 2017, where he reached the quarterfinal stage, eventually losing the ticket to the semifinals to Russia.