Theodotus II also known as Theodosius (Greek: Θεόδοτος or Θεοδόσιος), (? – October 1154) was a 12th-century clergyman who served as Patriarch of Constantinople from 1151 until 1153. Theodotus was an Abbot at the Monastery of the Resurrection in Constantinople. His two-year reign as Patriarch of Constantinople was uneventful, and he died in office. He was Patriarch during the rule of Byzantine emperor Manuel I Comnenus.