Mohammad Amir Ahmad Khan (Urdu: محمد عامر احمد خان), titled the Raja of Mahmudabad (راجہ صاحب محمود آباد) (5 November 1914 – 14 October 1973), was a prominent nobleman and member of the Pakistan Movement.

The Raja of Mahmudabad was initially opposed to the partition of India and came to serve as the president of the All-India Jamhur Muslim League, which worked to oppose the idea of a possible partition on religious grounds. He came to accept the idea of a separate state for Indian Muslims and became a leader of the All India Muslim League, which heralded the Pakistan Movement.

He served as Managing Trustee from 1940–1944 of Madrasatul Waizeen, a centre of Shia Islamic education founded by his father located in Lucknow.

He carried on the family tradition and was an accomplished poet in Urdu and Persian. He composed a number of ruba'iyat, salaams, and marsiya as well as some ghazals and nazms under the takhalus (nom de plume) of 'Bahr' and 'Mahbub'. One of his previously unpublished marsiya, entitled Jawn Martyr of Karbala Lamented, has been recently published in London.

He inherited the Estate of Mahamudabad in 1931 upon death of his father Maharaja Sir Mohammad Ali Mohammad Khan. After his demise, his estate - including the Metropole Hotel in Nainital - was taken over by the Government of India under 'Enemy Properties Act'. His wife, Rani Kaniz Abid, and his only son and heir Raja Mohammad Amir Mohammad Khan remained an Indian citizen and fought a case for recovery of their ancestral estate for reclaiming their heritage worth millions of rupees and the case is, at present, in high profile legal dispute in India. He won the case after 37 herculean years winning through district court, High Court of Bombay, and the Supreme Court of India which gave a landmark judgement in 2005 ordering "vacant possession" to his properties. Yet to date, the order is far from implementation as the Indian Government continues to bring emergency ordinances in order to block the Supreme Court order; so the case is back in the courts.

He was one of the youngest members of Working Committee of All India Muslim League in 1937. In the same year 1937, he founded All India Muslim Students Federation. He was initially against the partition of India and came to serve as the president of the All-India Jamhur Muslim League, which worked to oppose the idea of a partition of India.

However, when the Muslim League passed the Lahore Resolution in 1940, he started supporting the creation of Pakistan and after that time, the All India Muslim Students Federation mobilized to vocally support the Pakistan Movement. He changed his mind under the influence of Muhammad Ali Jinnah, who was a long time family friend, and Raja Sahib eventually supported the idea of a separate state for the Muslims of colonial India. Maharaja Mohammad Ali Mohammad Khan had created a trust with Motilal Nehru, Mohammad Ali Jinnah, Deputy Habibullah and Chaudhary Bam Bahadur Shah amongst others to administer the estate as his son was still a minor. Motilal Nehru died before the Maharaja and after the latter's death in 1931, Mohammad Ali Jinnah became the dominant personality on the board. He said that "...the idea of a separate Muslim state in India stirred the imagination of the Muslims as nothing else had done before."

Jinnah appointed him the President of All India Muslim Students Federation which later played a critical role for winning the referendum in North-West Frontier Province and some other general elections in British India. He also financially supported the leading promoter of All India Muslim League's ideology, the Dawn newspaper.