Seret or Sereter Hasidim were a group of Hasidic Jews that existed in the town of Siret (Seret) and the surrounding area in Bukovina (currently split between Romania and Ukraine) during the late nineteenth century until World War II.
They were headed by their Rebbe ("Grand Rabbi") whose family name was Rubin and was a scion of the Hasidic dynasties of the Kosov, Ropshitz and Belz. In practice the Seret Hasidic group was a branch of the Kosov dynasty.