Udham Singh (26 December 1899 - 31 July 1940) was an Indian revolutionary belonging to the Ghadar Party and HSRA, best known for assassinating Michael O'Dwyer, the former lieutenant governor of Punjab in India, on 13 March 1940. The assassination was done in revenge for the Jallianwala Bagh massacre in Amritsar in 1919, for which O'Dwyer was responsible. Singh was subsequently tried.
