Ahmad I ibn Mustafa
| Ahmad I Bey | |
|---|---|
| Ahmad I Bey | |
| Portrait of Ahmad I Bey in His Palace ,1846 | |
| Bey of Tunis | |
| Reign | 10 October 1837 – 30 May 1855 | 
| Predecessor | Mustafa ibn Mahmud | 
| Successor | Muhammad II ibn al-Husayn | 
| Born | Ahmad I ibn Mustafa Bey 2 December 1805 Tunis, Kingdom of Tunisia | 
| Died | 30 May 1855 (aged 49) La Goulette, Kingdom of Tunisia | 
| Burial | |
| Spouse | Emina Baya Chelbi | 
| Dynasty | Husainides | 
| Father | Mustafa ibn Mahmud | 
| Mother | Francesca Rosso di Sofia | 
| Religion | Islam | 
Ahmad I (Arabic: أبو العباس أحمد باشا باي), 2 December 1805 – 30 May 1855) was the tenth Husainid Bey of Tunis, ruling from 1837 until his death. He was responsible for the abolition of slavery in Tunisia in 1846.
He succeeded his father Mustafa Bey on 10 October 1837. He had grand ambitions - to expand his army and create a modern navy; to build a new royal residence (Mohamedia Palace), a mint and modern institutions of education but neither he nor his brother-in-law the young Mustapha Khaznadar who served as his finance minister, had a clear idea of what such initiatives would cost. As a result, many of his projects became expensive failures which damaged the financial health of the country.