| Sayyida Shirin | |
|---|---|
| Died | 1028 Ray |
| Spouse | Fakhr al-Dawla |
| Issue | Majd al-Dawla Shams al-Dawla |
| Dynasty | Bavand dynasty |
| Father | Rustam II |
| Religion | Shia Islam |
Sayyida Shirin (Persian: سیده شیرین; died 1028), also simply known as Sayyida (سیدا), was a Bavandid princess, who was the wife of the Buyid amir (ruler) Fakhr al-Dawla (r. 976–980, 984–997).
She was the regent of most of Jibal during the minority of her son, Majd al-Dawla (r. 997–1029), and served as de facto ruler also after her formal regency had ended during the reign of her son. She is notable for securing the governorship of Isfahan to her first cousin Ala al-Dawla Muhammad, thus marking the start of the Kakuyid dynasty.