The Defterdar Ibrahim Pasha Mosque (Greek: Ντεφτερντάρ Ιμπραήμ Πασά Τζαμί; Turkish: Defterdar Ibrahim Paşa Camii, "Mosque of Defterdar Ibrahim Pasha") is an Ottoman-era mosque in the island of Kos, in Greece. Built in the 18th century, it serves the Muslim-Turkish community of Kos, as one of the two out of the five Ottoman mosques to be still operational and open for prayers on Kos, the other being the Gazi Hasan Pasha Mosque.