The Zal Mahmud Pasha Mosque (Turkish: Zal Mahmut Paşa Camii) is a 16th-century Ottoman mosque located in the Eyüp district of Istanbul, Turkey.

The building of the mosque was jointly endowed by Şah Sultan and her second husband, the Bosnian born vizier, Zal Mahmud Pasha.

After the death of Şah Sultan's first husband in 1574 she married Zal Mahmud Pasha who in 1553 under Suleiman I's orders had strangled Şehzade Mustafa, a half-brother of Selim II and Suleiman's eldest son.

[1] The mosque was designed by the imperial architect Mimar Sinan.

Building work began in 1577 but was not completed until 1590, two years after Sinan's death.