Sadr Madrasa (Persian: مدرسه صدر‎) is one of the largest madrasas in Isfahan, Iran. It was built by Mohammad Hosseyn Khan Sadr Esfahani, the famous governor of Isfahan in the era of Fath-Ali Shah Qajar. Although the structure and decorations of its facade is incomplete, but it has a very serene and pleasant environment because of its very old trees.