Yaḥyā ibn Maʻīn (Arabic: يحيى بن معين‎) was a classical Islamic scholar of Persian origin. He was a close friend of Ahmad ibn Hanbal and is often quoted regarding Ilm ar-Rijal. Alongside Ibn Hanbal, Ali ibn al-Madini and Ibn Abi Shaybah, Ibn Ma'in has been considered by many Muslim specialists in hadith to be one of the four most significant authors in the field. From amongst his students were; Aḥmad bin Ḥanbal, Muḥammad bin Sʿad, Abū Khaithamah, al-Bukhārī, Muslim, Abū Dāwūd, ʿAbbās al-Dawrī, Abū Ḥātim, and many others.