'Kirti Vardhan Singh' (born 1 March 1966) is an Indian politician for the Gonda (Lok Sabha constituency) in Uttar Pradesh. He is sometimes known by the alias 'Raja Bhaiya', being connected with erstwhile jagir of Mankapur.He was member of 12th and 14th Lok Sabha from Gonda, Uttar Pradesh as Samajwadi Party candidate. In March 2014 he resigned and joined BJP and contested the 2014 Lok Sabh seat from Gonda.