The Vlastos family, also spelled Vlasto is the name of an old Greek Phanariote family of Byzantine origin, whose members played important political role in the history of Greece.

Notable members

• Sifis Vlastos (?), fifteenth century Cretan rebel
• Gregory Vlastos (1907–1991), scholar of ancient philosophy
• Kostia Vlastos (1883–1967) Greek scion of a family of bankers
• Nichi Vlastos (born 2000), American soccer player