Raja Pratap Bahadur Singh (1889–1921) was taluqdar of Pratapgarh Estate of Oudh, British India. He came from a Somvanshi Rajput family. He was Vice President of British Indian Association from 1911 to till 1918. Singh also represented as President of Akhil Bharatiya Kshatriya Mahasabha in 1907.
See also Pratapgarh Estate
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