| Mustafa ibn Mahmud | |
| Succession: | Bey of Tunis |
| Predecessor1: | Al-Husayn II ibn Mahmud |
| Successor1: | Ahmad I ibn Mustafa |
| Issue: | Ahmad I ibn Mustafa |
| House: | Husainides |
| House-Type: | Dynasty |
| Father: | Mahmud ibn Muhammad |
| Birth Date: | August 1787 |
| Death Date: | 10 October 1837 |
| Place Of Burial: | Tourbet el Bey, Tunis, Tunisia |
| Religion: | Islam |
Mustafa I (1786–1837) (ar|مصطفى الأول), commonly known as Mustapha Bey, was the ninth leader of the Husainid Dynasty and the ruler of Tunisia from 1835 until his death in 1837.[1]