Ballabhgarh (or Ballabgarh ) is a town and a tehsil (subdistrict) in Faridabad District of Haryana, India, and is part of the National Capital Region. Jat Raja Nahar Singh (1823–1858) was the last king of the princely state, he was executed died for taking part in the 1857 war of independence in 1858. The state was founded by Balram Singh, in 1739, who also built the Nahar Singh Mahal palace in the same year.