Cosmas III of Constantinople

{{Short description|Ecumenical Patriarch of Constantinople from 1714 to 1716}}

{{Use dmy dates|date=January 2025}}

{{Infobox Christian leader

| name = Cosmas III of Constantinople

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| church = Church of Constantinople

| archbishop_of = Ecumenical Patriarch of Constantinople

| term = 28 February 1714 –
23 March 1716

| predecessor = Cyprianus of Constantinople

| successor = Jeremias III of Constantinople

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| birth_date =

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| death_date = 1736

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| religion = Eastern Orthodoxy

}}

Cosmas III of Constantinople ({{langx|el|Κοσμᾶς}}; died 1736) was the Ecumenical Patriarch of Constantinople from 28 February 1714 to 23 March 1716.{{Cite web |url=http://www.ec-patr.org/list/index.php?lang=en |title=List of Patriarchs |publisher=Official web site of the Ecumenical Patriarchate of Constantinople |access-date=7 February 2011}}