Sangarus or Sangaros () was a town of ancient Bithynia near the shore of the Propontis. In the 4th century, an early Christian sect, the Novatianists, held a synod here. Yitzhak ha-Sangari may have been a native. Sangaros must be somewhere on the coast from Çınarcık/Yalova to Hersek Asiatic Turkey.<ref> (https://pleiades.stoa.org/places/511407; Sokrates, History of the Church, V.21) References Populated places in Bithynia Former populated places in Turkey History of Yalova Province