The largest district in Haryana by area is Hisar. It has a total area of 4,421 square kilometers. The other three districts are Bhiwani (4,092 square kilometers), Sirsa (3,940 square kilometers), and Mahendragarh (3,688 square kilometers).
Hisar is located in the northern part of Haryana, and it is bordered by the districts of Sirsa, Fatehabad, Jind, Kurukshetra, and Ambala. The city of Hisar is the administrative headquarters of the district.
The district of Hisar is a major agricultural region, and it is known for its production of wheat, rice, cotton, and sugarcane. The district is also home to a number of industries, including the manufacture of textiles, machinery, and chemicals.
The district of Hisar is a popular tourist destination, and it is home to a number of historical and religious sites, including the Hisar Fort, the Lal Mandir, and the Shahi Eidgah.