| Church: | Church of Constantinople |
| Archbishop Of: | Ecumenical Patriarch of Constantinople |
| Term: | October 1154 – November 1154 |
| Predecessor: | Theodotus II of Constantinople |
| Successor: | Constantine IV of Constantinople |
| Birth Date: | ? |
| Death Date: | after 1154 |
Neophytos I (Greek, Modern (1453-);: Νεόφυτος; died after 1154) was a 12th-century clergyman who served as Ecumenical Patriarch of Constantinople in 1153. Neophytos was a monk at the Monastery of Theotokos the Benefactor before being elevated to the Patriarchal throne after the death in office of his predecessor. His short reign as Patriarch of Constantinople—of about a year—was uneventful, and he retired to become an ascetic.[1] His short reign was during the rule of Byzantine emperor Manuel I Comnenus.