The Yazidids (Arabic: بنو يزيد, romanized: Bānū Yāzīd) or Mazyadids (after their ancestor Mazyad al-Shaybani) or Shaybanids (after Banu Shayban), were an Arab family that came to rule over the region of Shirvan (in Azerbaijan) in the mid 9th century. Starting from Haytham ibn Khalid's assumption of the ancient Iranian title of Shirvanshah in 861, they practically broke free of Abbasid control and was therefore out of scope for most chroniclers of the Caliphate.

The dynasty was named after Yazid ibn Mazyad al-Shaybani, an Abbasid Governor of Arminiyah. Yazidid dynasty was first generation of whole independent Shirvanshahs. Dynasty ruled both Shirvan and Layzan, until latter invaded Shamakhy and united crowns. The dynasty was a vassal and tributary state to Sallarids, Sajids and others. The Mazyadid reign is largely unexplored due to lack of sources. Sometimes numismatic evidences are the only sources about reign and existence of shahs.