Vlasto or Vlastos is a surname. Notable people with the surname include:
Chris Vlasto (born 1966), American television producer
Dominique Vlasto (born 1946), French politician
James S. Vlasto (born 1934) Press Secretary to Governor Hugh L. Carey of New York
George S. Vlasto (1928-2014) Assistant Professor of Physiology and Neurobiology at University of Connecticut
Alexis (Peter) Vlasto (1915-2000) Slavonic scholar at Cambridge University
Gregory Vlastos (1907-1992) Philosophy at Princeton
Julie Vlasto (1903–1985), French tennis player
Solon G. Vlasto (1903-1998) Publisher of the Atlantis newspaper
Kostia Vlastos (1883-1967) Banker and war journalist
Demetrius J. Vlasto (1869–1944)- Founder of the Atlantis newspaper
Solon Stylien J. Vlasto (1852–1927) Founder of the Atlantis newspaper
Ernest-Michel Vlasto (1848-1894)- Distinguished engineer
Jean C. Vlasto (1814-1869) - Teacher and writer
Syphis Vlasto c. 15th – Resistance Leader, Crete
Nicolas Vlasto c. 15th – Pioneer printer Venice
Meletios Vlastos (1576-1643) - Well known preacher, scholar and teacher.