Sultan Mahmut Fountain () is a historical public fountain in Istanbul, Turkey.
The fountain is located in Kireçburnu neighborhood of Sarñyer secondary municipality by Bosphorous.
It was commissioned by Ottoman sultan Mahmut II (reigned 1808âÂÂ1839) in 1814. Its ornamental slab as well as the inscription is made of marble. The inscription includes a tughra of the sultan. The inscription was written by Yesarizade Mustafa Izzet Efendi.
Presently, the fountain is out of use.