IUMS may refer to:
Isfahan University of Medical Sciences, located in Isfahan, Iran Iran University of Medical Sciences, located in Tehran, Iran The International Union of Microbiological Societies, a Scientific Union member of the International Council for Science The International Union of Muslim Scouts headquartered in Saudi Arabia The International Union of Muslim Scholars (al-Ittihad al-Alami li-Ulama al-Muslimin, formerly translated as the International Association of Muslim Scholars, IAMS) presided by Yusuf al-Qaradawi and headquartered at the Islamic Cultural Centre of Ireland