Al-Daylami or al-Dailami () is a nisba indicating a Dailamite or a person from Daylam. It may refer to:
Fayruz al-Daylami companion of the Islamic prophet Muhammad. Nafi Mawla Ibn Umar, Tabi'un scholar and narrator of Hadith Muta of Daylam, king of Daylam John of Dailam, 7th-century East Syriac Christian saint and monk Al-Farra', 8/9th-century Kufan scholar Imad al-Dawla Daylami, founder of the Buyid dynasty (r. 934–949) 'Adud al-Dawla Daylami, emir of the Buyid dynasty (r. 949–983) Abu'l-Fath an-Nasir ad-Dailami, Zaidi imam in Yemen (r. 1038–1053) Abu'l-Hasan Mihyar al-Daylami 11th-century Arabic-language poet Abū Manṣūr al-Daylamī, 12th-century Islamic scholar and author of Musnad al-Firdous Malek Deylami, 16th century scrivener and calligrapher Kushyar Daylami, (971–1029; a.k.a. Kūshyār Daylami), Persian astronomer