Ballabhgarh (बल्लभगढ़) is a town and tahsil in Faridabad District of Haryana, India. Raja Nahar Singh (18231858) was King of this princely state. The forefathers of Jat Raja Nahar Singh had built a fort here around 1739 AD. The small kingdom of Ballabhgarh is only 20 miles from Delhi. The name of the Jat Raja Nahar Singh will always be highly regarded among those who martyred themselves in the 1857 war of independence.