| Church: | Church of Constantinople |
| Archbishop Of: | Ecumenical Patriarch of Constantinople |
| Term: | January 1389 – July 1390 March 1391 – May 1397 |
| Predecessor: | Nilus of Constantinople, Macarius of Constantinople |
| Successor: | Macarius of Constantinople, Callistus II of Constantinople |
| Death Date: | May 1397 |
Antony IV (Greek: Ἀντώνιος; died May 1397) was the Ecumenical Patriarch of Constantinople for two terms, from January 1389 to July 1390, and again from early 1391 until his death.
He was originally a hieromonk, possibly from the Dionysiou monastery in Mount Athos. He was deposed during the usurpation of John VII Palaiologos in April 1390, and replaced by Macarius, who had already served in the office in 1377–1379. After the restoration of John V Palaiologos and Manuel II Palaiologos a few months later, he was restored to his post.
He is notable for his correspondence with Jagiello, Grand Duke of Lithuania, urging him to join in a crusade against the Turks along with the Hungarians, and with Basil I of Muscovy, to whom he defended not only the universal spiritual authority of the Constantinopolitan patriarchate, but also the universal authority of the Byzantine emperors, regardless of the actual diminished state of the Byzantine Empire.