| Patriarch Of: | Ecumenical Patriarch of Constantinople |
| Enthroned: | 535 |
| Ended: | 536 |
| Religion: | Eastern Christianity |
Anthimus I (Greek: Ἄνθιμος; died after 536) was a Miaphysite patriarch of Constantinople from 535–536. He was the bishop or archbishop of Trebizond before accession to the Constantinople see. He was deposed by Pope Agapetus I for adhering to Miaphysitism (the belief that Jesus had only one nature completely divine and human) before March 13, 536,[1] [2] and later hidden by Theodora in her quarters for 12 years, until her death.