(Στράττις), tyrant of Chios in the time of Dareius Hystaspis and Xerxes, was one of those whom Dareius, in his Scythian expedition, left in charge of the bridge of boats over the Danube. At the period of the invasion of Greece by Xerxes, seven citizens of Chios conspired against Strattis, but the plot was revealed by one of their number, and the remaining six were obliged to seek safety in flight. They first applied for aid to Sparta, whence they proceeded to the Greek fleet, under the command of Leotychides, at Aegina, B. C. 479, and entreated their countrymen, but for the time without success, to strike a blow for the restoration of independence to Ionia. (Hdt. 4.138, 8.132.)