| Abu al-Qasim Muhammad ibn Abbad I | |
| Succession: | Emir of the Seville Taifa |
| Reign: | 1023–25 January 1042 |
| Predecessor: | Position established |
| Successor: | Abbad II al-Mu'tadid |
| Birth Date: | c. 984 |
| Birth Place: | Al-Andalus |
| Death Date: | 25 January 1042 |
| Death Place: | Seville (Spain) |
| Burial Place: | Seville |
| Full Name: | Abu al-Qasim Muhammad ibn Abbad (Arabic: أبو القاسم محمد بن عباد) |
| Dynasty: | Abbadid |
| Father: | Isma'il ibn Qarays ibn Abbad ibn Amr ibn Aslan ibn Amr ibn Itlaf ibn Na'im ibn Na'im al-Lakhmi |
| Issue: | Abbad II al-Mu'tadid |
| Issue-Type: | Children |
| Religion: | Sunni Islam |
Abu al-Qasim Muhammad ibn Abbad (or Abbad I; 984[1] - 25 January 1042) was the eponymous founder of the Abbadid dynasty; he was the first independent Muslim ruler of Seville in Al-Andalus ruling from 1023 until his death in 1042.[2]
Abu al-Qasim Muhammad ibn Abbad was a qadi (religious judge) when he was named governor of Seville by the caliph of Cordoba, Yahya ibn Ali ibn Hammud al-Mu'tali, in 1023. However, with the Caliphate of Cordoba losing its integrity, the Abbadids, a Sevillan family of Arabic origins, seized control.[3]
As a result, later in 1023, Abu al-Qasim Muhammad ibn Abbad declared Seville independent from Córdoban rule,[4] establishing the taifa of Seville.