Shah Sultan Ahmad Nanupuri (Bengali: শাহ সুলতান আহমদ নানুপুরী; 26 June 1914 – 16 August 1997), also known by his daak naam Badshah, was a Bangladeshi Islamic scholar, teacher and author.

Shah Sultan Ahmad was born on 26 June 1914, to a Bengali Muslim family in the village of Dharmapur, located under the Fatikchhari subdivision of the Bengal Province's Chittagong District.

[1] His father, Shah Fazlur Rahman, worked in Rangoon, British Burma and his mother, Umdah Khatun, was a housewife.

Among his teachers were Hussain Ahmad Madani, Izaz Ali Amrohi, Ibrahim Balyawi, Zahur Ahmed, Habibullah Mirathi and Riyaz ad-Din.

After graduating and returning to Bengal, he sent a letter to join the faculty at the Al-Jamia al-Arabia Nasirul Islam in Nazirhat Bazar and was accepted to teach there.

Usmani was a supporter of the All-India Muslim League, whilst Nanupuri strongly believed that religious institutions like the madrasa should be free from political influence.

[5] Nanupuri's leading khalifah (spiritual successor) Said Ahmad established a madrasa in Feni named after him as Al-Jamiah al-Islamiyyah as-Sultaniyyah.

He also wrote a biography on his teacher titled "Shah Sultan Ahmad Nanupuri's life and teachings" which was published by the Hakimul Ulama Foundation Bangladesh.

[10][11] His disciples have founded numerous institutions and organisations in his name such as the Allama Shah Sultan Ahmad Foundation Bangladesh, and his speeches have been collected and published.