Mustafa IV (September 8, 1779 - 1808) was the sultan of the Ottoman Empire from 1807 to 1808. His father was Abd-ul-Hamid I. During the reign of Selim III, Mustafa was looked upon favorably by the sultan.

However, when a janissary revolt rose up against Selim, Mustafa deceived the sultan and supported the janissaries who deposed the old Sultan, and made Mustafa the new ruler. When an army set out for Istanbul in order to bring Selim back to the throne, Mustafa had the old sultan killed. However, the rebel army would suceed in removing Mustafa, and they would kill him in 1808, replacing him with his brother, Mahmud II.