Jeremias IV (Greek: Ἰερεμίας; died 1824) was the Ecumenical Patriarch of Constantinople during the period 1809–1813.

He came from Crete. He became protosyncellus of the Ecumenical Patriarchate and was later elected metropolitan bishop of Mytilene (1783–1809). In 1809, he was elected Ecumenical Patriarch of Constantinople.

Even though of average education, he is considered a successful Patriarch, as he was prudent with remarkable administrative skills. He was also characterised as a remarkably brave protector of the interests of the church. In 1813, he resigned for health reasons. He retired to Mytilene, where he died in 1824.

• Ecumenical Patriarchate