Muhammadiyah (Arabic: محمدية; lit. 'followers of Muhammad'); also known as the Muhammadiyah Society (Indonesian: Persyarikatan Muhammadiyah) is a major Islamic non-governmental organization in Indonesia The organization was founded in 1912 by Ahmad Dahlan in the city of Yogyakarta as a reformist socioreligious movement, advocating ijtihad - individual interpretation of Qur'an and Sunnah, as opposed to Taqlid - conformity to the traditional interpretations propounded by the ulama.
Since its establishment, Muhammadiyah has adopted a reformist platform mixing religious and secular education, primarily as a way to promote the upward mobility of Muslims toward a 'modern' community and to purify Indonesian Islam of local syncretic practices. It continues to support local culture and promote religious tolerance in Indonesia, while a few of its higher education institutions are attended mostly by non-Muslims, especially in East Nusa Tenggara and Papua provinces. The group also runs a large chain of charity hospitals, and operated 128 universities as of the late 1990s. In 2008, Muhammadiyah was considered the second largest Islamic organization in Indonesia with 29 million members.