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Cyril IV
Ecumenical Patriarch of Constantinople
ChurchChurch of Constantinople
DioceseConstantinople
SeeEcumenical Patriarchate
Installed1711
Term ended1713
PredecessorAthanasius V
SuccessorCyprianus
Personal details
Bornunknown
Died1728
Constantinople
DenominationEastern Orthodox Church
OccupationEcumenical Patriarch

Cyril IV (Greek: Κύριλλος; died 1728) was Ecumenical Patriarch in 1711–1713. He was also metropolitan bishop of Cyzicus.

He was elected patriarch in 1709, but took office only after Athanasius V of Constantinople was deposed. He resigned in 1713 and remained in Constantinople until his death in 1728.