Nasiruddin (Arabic: نصرالدین, lit. 'defender of the faith') was originally an honorific title and is a masculine given name and surname of Arabic origin. There are many variant spellings in English due to transliteration including Nasir al-Din, and Nasruddin. Notable people with the title or name include:

People with the given name Nasiruddin

• Nasiruddin Mahmud (eldest son of Iltutmish) (died 1229), ruler of Bengal
• Nasiruddin Mahmud Shah, Sultan of Delhi (1246–1266), Muslim Turkic ruler
• Nasiruddin Bughra Khan, governor and then Sultan of Bengal (1281–1291)
• Nasiruddin Chiragh Dehlavi (1274–1356), mystic-poet and Sufi saint
• Nasiruddin Mahmud Shah of Bengal (died 1459), sultan of Bengal
• Nasiruddin Sailani Badesha (died 1507), Sufi saint
• Nasiruddin Nasrat Shah (died 1532), sultan of Bengal
• Nasiruddin Khan (c. 1948 – 2018), an Indian politician from West Bengal
• Nasiruddin Ahmed Pintu (1967–2015), Bangladeshi politician
• Nasiruddin Yousuff (fl. from 1973), Bangladeshi stage and film director
• Nasiruddin Faruque (born 1983), Bangladeshi cricketer
• Nasiruddin Chowdhury (born 1985), Bangladeshi footballer
• Nasiruddin Nasir (born 1992), Malaysian actor

People with the middle name or father's name

• Ismail Nasiruddin of Terengganu (1907–1979), Yang di-Pertuan Agong of Malaysia
• Muhammad Nasiruddin al-Albani (1914–1999), Syrian-Albanian Islamic scholar

People with the surname Nasiruddin

• Advocate Nasiruddin (1892–1949), lawyer and political and social leader from Bhopal, India
• Mir Mohammad Nasiruddin (fl. from 1990s), Bangladeshi politician
• Mohammad Nasiruddin (1888–1994), Bangladeshi journalist
• Shaikh Nasiruddin (1916-1991), an Indian cricketer
• Syed Nasiruddin, a Sufi saint and military leader associated with the spread of Islam in Bengal in the 14th century

See also

• ad-Din, Arabic name suffix
• Nimatnama-i-Nasiruddin-Shahi, 16th-century medieval Indian cookbook, written in Persian language
• Nasir al-Din (disambiguation)