| Hasan ibn Zayd | |
|---|---|
| Emir of Tabaristan | |
 Silver dirham issued by Hasan | |
| Reign | 864–884 |
| Successor | Muhammad ibn Zayd |
| Born | Medina |
| Died | 6 January 884 Amol |
| Issue | One daughter (possibly) |
| House | Zaydid dynasty |
| Father | Zayd ibn Muhammad |
| Mother | Amina bint Abd Allah |
| Religion | Shi'a Islam |
Abū Muḥammad al-Ḥasan ibn Zayd ibn Muḥammad ibn Ismaʿīl ibn al-Ḥasan ibn Zayd (Arabic: الحسن بن زيد بن محمد; died 6 January 884[citation needed]), also known as al-Dāʿī al-Kabīr (Arabic: الداعي الكبير, "the Great/Elder Missionary"), was an Alid who became the founder of the Zaydid dynasty of Tabaristan.[1]