Konstantina Vlachaki (Greek: Κωνσταντίνα Βλαχάκη; born May 8, 1995, in Chania, Greece) is a female professional volleyball player from Greece, who laste played in Hellenic Volley League for Panathinaikos.

From 2014 to 2019 as a member of Olympiacos Piraeus[1] she won 5 Hellenic Championships, 5 Hellenic Cups, and the CEV Women's Challenge Cup in 2018,[2] being also runner-up of the CEV Women's Challenge Cup in 2017.

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