Rajnath Singh was born in Bhabhaura village of Chandauli district, Uttar Pradesh to father Ram Badan Singh and mother Gujarati Devi. He was born into a family of farmers. He received his primary education from a local school of his village and went on to secure a master's degree in physics, acquiring first division results from Gorakhpur University. From childhood he was inspired by the ideology of Rashtriya Swayamsevak Sangh. He worked as a lecturer of Physics at K.B. Post-Graduate College Mirzapur, UP. He also has a brother, Jaipal Singh