Colonel the Honourable Kanwar Sir Pratap Singh Bahadur of Kapurthala (1871-5 December 1911) was a Punjabi politician and scholar.
The son of Kanwar Bikrama Singh of Kapurthala, Pratap Singh was an honorary magistrate and civil judge in Punjab. He served as a member of the Punjab Legislative Council from 1906 to 1911 and the Imperial Legislative Council 1910 – 1911. He was a founder of the Punjab Chiefs' Association.
Actively involved in the Sikh renaissance movement, Pratap Singh was a scholar of history and religion and was an eminent musicologist of his time.