Sadr al-Din
Sadr al-Din (Arabic: صدر الدين, Persian: صدرالدین) may refer to:
- Sadr al-Din al-Qunawi (died 1274), Persian Sufi writer
 - Sadr al-Dīn Mūsā (1305–1391), leader of the Safaviya order
 - Sadr ad-Dīn Abu'l Ḥasan ʿAlī Ibn Abi al-Izz (1331–1390), Syrian Sunni Hanafi jurist and theologian
 - Pir Sadardin (14th century), Persian founder of Khoja Ismaili sect
 - Sheikh Sadruddin (1434–1515), Jagirdar of Maler in India
 - Ṣadr ad-Dīn Muḥammad Shīrāzī, or just Mulla Sadra (c. 1571–1636), Persian Shia Islamic philosopher
 - Sadruddin Khan Azurda Dehlawi (1804–1868), Indian Islamic scholar
 - Sadreddin Nizamettinovich Maksudov, or Sadri Maksudi Arsal (1878–1957), Tatar and Turkish statesman
 - Sadriddin Ayni (1878–1954), Tajik poet, journalist, historian
 - Sadr al-Din bin Saleh (late 19th century), Twelver Shi'a religious scholar
 - Sadr al-Din al-Sadr (1882–1954) Iraqi ayatollah
 - Sadruddin Islahi (1917–1988), Indian poet and activist
 - Mehmet Sadrettin Alışık, or just Sadri Alışık (1925–1995), Turkish film actor
 - Prince Sadruddin Aga Khan (1933–2003), French Muslim United Nations official
 - Ali Sadreddine Bayanouni (born 1938), Syrian active in the Muslim Brotherhood
 - Saddaruddin Hashwani (born 1940), Pakistani businessman
 - Sadruddin Mohammad Hossain (born 1941), former chief of the Bangladesh Air Force