Historically, Hisar was founded by Firoz Shah Tughlaq. It was called as Hissar-e-Firoza. Hisar is named after the Jats, came from the place known as Bal Hisar or Mood Hisar or Hisar from Afganistan. The name of the place is also believe to be derived from the Arabic word ‘ Hisar’ which means ‘Fort’. But as the days rolled by, the very word ‘Firoza’ was dropped from its original name. It was the largest district in Harayana till 1966. It was bifurcated for two times. The district has battalion headquarters of B.S.F. 3rd Bn. H.A.P. and commando force and headquarters of Police Range. It also has largest administrative and judiciary complex. Indus Valley Civilization flourished here. It is also popularly known as the steel city since it has the largest producer of steel called Jindal Stainless Steel Factories.

Om Prakash Jindal (O.P. Jindal) was born in Hisar, Haryana. He founded Jindal Steel and Power. He won the "Life Time Achievement Award" in 2004. He served as MLA from Harayana three times consecutively and Minister of Power in Harayana Government. He became the member of Food, Civil Supplies and Public Distribution in 1996. Subhash Chandra or Subhash Chandra Goel, is an Indian media tycoon, businessman, television personality, motivational speaker and philanthropist. He is chairman of India's largest TV channel network Zee Media and Essel Group.

Geographically, the district has a total 3,983 sq. km. area and it occupies the rank 3rd in State and 308th in India on the basis of size. It lies at 29°15'N latitude, 75°72'E longitude and 202 m altitude. In the year 2021, there was a total 1.44% forest area of total geographical area. The climate of the district is quite similar to the continental climate, with extremely hot summers and fairly cool winters. Most of its rainfall occurs in the monsoon season. The actual rainfall in the district was 639.0 mm in the year of 2021-22.

Administrative wise, the district is divided into 4 sub-districts, 11 towns and 269 villages. Hindi is its official language. In the state of Haryana with an allotted district code of 80 the district of Hisar came into existence in the year 1354 AD with its administrative headquarters located at Hisar which is situated at a distance of 231 kms from the State Capital.

Demographically, according to 2011 census, the district has a total number of 3,25,046 households with a total of 17,43,931 comprising 9,31,562 are males, and 8,12,369 are females which causing it to rank 2nd in the State and 277th in India. The density of population of the district is 438 persons per sq. km. The sex ratio is pegged at 872 females for every 1000 males while the child ratio stands at 851 females per 1000 males. The schedule caste population of the district is recorded as 4,08,785 including 2,17,338 are males and 1,91,447 are females. According to the 2011 census, the percentage of principal languages of the region is Hindi with 96.08%. In the year 2020 the number of live births in the district was 39,297 out of which 20,577 were males and 18,716 were females. In the same year the number of deaths in the district was 18,501 out of which 11,858 were males and 6,640 were females. The population growth rate during the period 2001 to 2011 was 13.45% out of which 12.17% were males and 14.97% were females. As per 2011 census the major religion in the district is Hindu with 97.54% of the total population.

Economically, agriculture is the prime source of income for the people of the district. The district is famous for steel production. The GDDP or Gross District Domestic Product during the period 2005-06 was Rs. 6,21,992 lakh at Current Price and Rs. 4,95,070 lakh at Constant Prices during the period 1999-2000. The NDDP, or Net District Domestic Product during the period 2005-06 was Rs. 5,64,587 lakh at Current Price and Rs. 4,51,881 lakh at Constant Prices during the period 1999-2000. The Per Capita Income or NDDP, at factor cost during the period 2011-12 was Rs. 88,759 lakh at Current Price during the period 2004-2005.

Education wise, according to the 2011 census, the literacy rate in the district is 72.89% out of which 82.2% are males and 62.25% are females. The total literate population of the district is 11,14,311 including 6,70,200 are males and 4,44,111 are females. There a several universities namely Chaudhary Charan Singh Haryana Agricultural University, Lala Lajpat Rai University of Veterinary and Animal Sciences, and Guru Jambheshwar University of Science and Technology. A number of students from across the country come here for higher education. The district also has several well known schools likewise Angel Public School, Indus Public School, Army Public School, Thakur Dass Bhargava Senior Secondary Model School and Vidya Devi Jindal School.

Mani Ram Bagri was a politician who served three terms in the Indian Parliament. He was the first speaker who addressed the International Parliamentary Conference in Hindi. He was a socialist. Abhimanyu Singh Sindhu is a politician, decorated Indian Army soldier, award-winning newspaper editor, entrepreneur, educationist and philanthropist. Now, he is serving as a Cabinet Minister. He belongs to the Bharatiya Janata Party (BJP). He is the chairman of various organizations such as Param Mitra Manav Nirman Sansthan and Sindhu Education Foundation etc. In 2014, he became the MLA from Narnaund in Haryana Vidhan Sabha constituency.

The district has various tourist places which are famous in the world. These places are Ancient Gumbad, Ancient Mound, Ancient Site of Rakhigarhi, Barsi Gate, British Palace, Durgah Char Qutab, Feroz Shah's Palace and Tahakhanas, Gujari Mahal, Jahaj Kothi, Lat ki Masjid, Ruined Qila. In the year 2020-2021, there were total 12,922 domestic tourists. The site of Rakhigarh belongs to the Harappan civilization. This site was excavated by Shri. Amarendra Nath of Archeological Survey of India. Blades; terracotta and shell bangles; beads of semiprecious stones, terracotta, shell and copper objects; animal figurines, toy cart frame and wheel of terracotta; bone points; inscribed steatite seals and sealing’s of Harrappa civilization are founded here. Jahaj Kothi was the residence of George Thomas, who was a native of Ireland and the uncrowned ruler of the territory between Sirsa and Rohtak. It is named as Jahaj because it gives the impression of a ship. Firoz Shah Palace was built by Firuz Shah Tughlaq in 1354 AD. Original, it had four gates named Delhi gate, Mori gate, Nagauri gate and Talaqi gate. It also has a mosque ‘Lat ki Masjid’. It also consists of Ashokan pillar, Diwan-e-Aam and Gujri Mahal. British Palace was built by British authorities in about 1810 AD. It was a bungalow of the Superintendent of Hisar Cattle Farm. It is a European styled double-storey palace.