Hájí Mírzá Ḥasan-i-Adíbu'l-ʻUlamá (Arabic: حاج میرزا حسن اديب‌العلماء‎; September 1848–2 September 1919), known as Mírzá Ḥasan or Adíb, was an eminent follower of Baháʼu'lláh, the founder of the Baháʼí Faith.

His father was an eminent Islamic cleric and Mírzá Hasan went through the usual religious education in Tihrán and Mashhad.

He became the Friday prayer leader at the Daru'l-Funun, Iran's first technical college set up by the Shah, where he received his title of Adíbu'l-'Ulamá (littérateur of the 'Ulamá) In 1874 he was employed by the Qajar princes, writing a large number of encyclopedic books on their behalf.

[1] Mírzá Hasan's acceptance of Baháʼu'lláh was the result of several Baháʼí friends, including Nabíl-i-Akbar, who prompted him to investigate the teachings.

[1] After the passing of Baháʼu'lláh in 1892, Mírzá Hasan became instrumental in dealing with the activities of Covenant-breakers in Iran.