Sonipat district is one of the 22 districts of Haryana state in North India. Sonipat town is the district headquarters. It is a part of National Capital Region. It is bordered by Delhi, Panipat, Rohtak, Jind, Jhajjar and Baghpat (Uttar Pradesh).

The district borders union territory of Delhi in south, Panipat District in the north, Jind District in the north-west, Uttar Pradesh state in the east with the Yamuna River acting as a border and Rohtak District in the west.