西里尔·卢卡里斯（希腊语：Κύριλλος Λούκαρις，1572年11月13日－1638年6月27日），本名君士坦丁·卢卡里斯，希腊主教暨神学家，生于克里特岛甘地亚（威尼斯共和国控制）。后成为亚历山大希腊牧首西里尔三世以及君士坦丁堡普世牧首西里尔一世。卢卡里斯致力于透过抗议宗与喀尔文式的归正神学来进行对正教会的改革。西里尔试图将喀尔文的神学思想导入正教会一事遭到抵制，而其行为与刺激，在正教会内依旧是争论的问题。

Hieromartyr Cyril Lucaris or Loukaris (Greek:Κύριλλος Λούκαρις, 13 November 1572 – 27 June 1638), born Constantine Lucaris, was a Greek prelate and theologian, and a native of Candia, Crete (then under the Republic of Venice). He later became the Greek Patriarch of Alexandria as Cyril III and Ecumenical Patriarch of Constantinople as Cyril I. Lucaris strove for a reform of the Eastern Orthodox Church along Protestant and Calvinist lines. Attempts to bring Calvinism into the Orthodox Church were rejected, and Cyril's actions and motivations remain a matter of debate among the Orthodox.