<P> Sectoral development is looked after by the district head of each development department such as PWD, Health, Education, Agriculture, Animal husbandry, etc . These officers belong to the various State Services . </P> <P> Government of Haryana has divided Haryana state in the following 22 districts: </P> <Table> <Tr> <Th> District </Th> <Th> Code </Th> <Th> Headquarters </Th> <Th> Established </Th> <Th> Area (in km2) </Th> <Th> Population (As of 2012) </Th> <Th> Map </Th> </Tr> <Tr> <Td> Ambala </Td> <Td> AM </Td> <Td> Ambala </Td> <Td> 1 November 1966 </Td> <Td> 1,574 </Td> <Td> 1,136,784 </Td> <Td> </Td> </Tr> <Tr> <Td> Bhiwani </Td> <Td> BH </Td> <Td> Bhiwani </Td> <Td> 22 December 1972 </Td> <Td> 4,778 </Td> <Td> 1,629,109 </Td> <Td> </Td> </Tr> <Tr> <Td> Charkhi Dadri </Td> <Td> CD </Td> <Td> Charkhi Dadri </Td> <Td> 18 September 2016 </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Faridabad </Td> <Td> FR </Td> <Td> Faridabad </Td> <Td> 15 August 1979 </Td> <Td> 1,792 </Td> <Td> 1,798,954 </Td> <Td> </Td> </Tr> <Tr> <Td> Fatehabad </Td> <Td> FT </Td> <Td> Fatehabad </Td> <Td> 15 July 1997 </Td> <Td> 2,538 </Td> <Td> 941,522 </Td> <Td> </Td> </Tr> <Tr> <Td> Gurugram </Td> <Td> GU </Td> <Td> Gurugram </Td> <Td> 1 November 1966 </Td> <Td> 1,253 </Td> <Td> 1,514,085 </Td> <Td> </Td> </Tr> <Tr> <Td> Hisar </Td> <Td> HI </Td> <Td> Hisar </Td> <Td> 1 November 1966 </Td> <Td> 3,983 </Td> <Td> 1,742,815 </Td> <Td> </Td> </Tr> <Tr> <Td> Jhajjar </Td> <Td> JH </Td> <Td> Jhajjar </Td> <Td> 15 July 1997 </Td> <Td> 1,834 </Td> <Td> 956,907 </Td> <Td> </Td> </Tr> <Tr> <Td> Jind </Td> <Td> JI </Td> <Td> Jind </Td> <Td> 1 November 1966 </Td> <Td> 2,702 </Td> <Td> 1,332,042 </Td> <Td> </Td> </Tr> <Tr> <Td> Kaithal </Td> <Td> KT </Td> <Td> Kaithal </Td> <Td> 1 November 1989 </Td> <Td> 2,317 </Td> <Td> 1,072,861 </Td> <Td> </Td> </Tr> <Tr> <Td> Karnal </Td> <Td> KR </Td> <Td> Karnal </Td> <Td> 1 November 1966 </Td> <Td> 2,520 </Td> <Td> 1,506,323 </Td> <Td> </Td> </Tr> <Tr> <Td> Kurukshetra </Td> <Td> KU </Td> <Td> Kurukshetra </Td> <Td> 23 January 1973 </Td> <Td> 1,530 </Td> <Td> 964,231 </Td> <Td> </Td> </Tr> <Tr> <Td> Mahendragarh </Td> <Td> MH </Td> <Td> Narnaul </Td> <Td> 1 November 1966 </Td> <Td> 1,859 </Td> <Td> 921,680 </Td> <Td> </Td> </Tr> <Tr> <Td> Nuh </Td> <Td> NH </Td> <Td> Nuh </Td> <Td> 4 April 2005 </Td> <Td> 1,874 </Td> <Td> 1,089,406 </Td> <Td> </Td> </Tr> <Tr> <Td> Palwal </Td> <Td> PL </Td> <Td> Palwal </Td> <Td> 15 August 2008 </Td> <Td> 1,359 </Td> <Td> 1,040,493 </Td> <Td> </Td> </Tr> <Tr> <Td> Panchkula </Td> <Td> PK </Td> <Td> Panchkula </Td> <Td> 15 August 1995 </Td> <Td> 898 </Td> <Td> 558,890 </Td> <Td> </Td> </Tr> <Tr> <Td> Panipat </Td> <Td> PP </Td> <Td> Panipat </Td> <Td> 1 November 1989 </Td> <Td> 1,268 </Td> <Td> 1,202,811 </Td> <Td> </Td> </Tr> <Tr> <Td> Rewari </Td> <Td> RE </Td> <Td> Rewari </Td> <Td> 1 November 1989 </Td> <Td> 1,582 </Td> <Td> 896,129 </Td> <Td> </Td> </Tr> <Tr> <Td> Rohtak </Td> <Td> RO </Td> <Td> Rohtak </Td> <Td> 1 November 1966 </Td> <Td> 1,745 </Td> <Td> 1,058,683 </Td> <Td> </Td> </Tr> <Tr> <Td> Sirsa </Td> <Td> SI </Td> <Td> Sirsa </Td> <Td> 26 August 1975 </Td> <Td> 4,277 </Td> <Td> 1,295,114 </Td> <Td> </Td> </Tr> <Tr> <Td> Sonipat </Td> <Td> SO </Td> <Td> Sonipat </Td> <Td> 22 December 1972 </Td> <Td> 2,122 </Td> <Td> 1,480,080 </Td> <Td> </Td> </Tr> <Tr> <Td> Yamunanagar </Td> <Td> YN </Td> <Td> Yamunanagar </Td> <Td> 1 November 1989 </Td> <Td> 1,768 </Td> <Td> 1,214,162 </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> District </Th> <Th> Code </Th> <Th> Headquarters </Th> <Th> Established </Th> <Th> Area (in km2) </Th> <Th> Population (As of 2012) </Th> <Th> Map </Th> </Tr>

Which one was the last formed district of haryana