Khan Bahadur Sir Mohammad Usman was an Indian politician, hakim and socialite who served as the Minister of Home for the Madras Presidency in the Justice Party government of the Raja of Bobbili and as the first Indian acting Governor of Madras from 16 May 1934 to 16 August 1934. His name is often written Muhammad Usman.

The Justice Party, officially the South Indian Liberal Federation, was a political party in the Madras Presidency of British India. It was established on 20 November 1916 in Victoria Public Hall in Madras by Dr C. Natesa Mudaliar and co-founded by T. M. Nair, P. Theagaraya Chetty and Alamelu Mangai Thayarammal as a result of a series of non-Brahmin conferences and meetings in the presidency. Communal division between Brahmins and non-Brahmins began in the presidency during the late-19th and early-20th century, mainly due to caste prejudices and disproportionate Brahminical representation in government jobs. The Justice Party's foundation marked the culmination of several efforts to establish an organisation to represent the non-Brahmins in Madras and is seen as the start of the Dravidian Movement.