Akhil Bharat Hindu Mahasabha (lit. ’All-India Hindu Grand Assembly’) is a Hindu nationalist political party in India.

Founded in 1915, the Mahasabha functioned mainly as a pressure group advocating the interests of orthodox Hindus before the British Raj and within the Indian National Congress.[2] In the 1930s, it emerged as a distinct party under the leadership of Vinayak Damodar Savarkar, who developed the Hindutva (“Hinduness”) and became a fierce opponent of the secular nationalism espoused by the Congress party.

During the World War II, the Mahasabha supported the British war effort and briefly entered coalitions with the Muslim League in provincial and central councils. After the assassination of Indian leader Mahatma Gandhi by Hindu Mahasabha activist Nathuram Godse, the Mahasabha’s fortunes diminished in Indian politics, and it was soon eclipsed by the Bharatiya Jana Sangh.