Explanation:

Hisar district, is one of the 22 districts of Haryana state, India. Hisar city serves as the district headquarters. The district is also part of Hisar division, which is headed by a commissioner who is employed by the Indian Administrative Service.

The largest district in Haryana until its 1966 reorganization, some parts of Hisar were transferred to the newly created Jind district. In 1974, Tehsil Bhiwani and Loharu were transferred to Bhiwani district. Hisar was further bifurcated when Sirsa district was formed. Fatehabad district was later created as well.