<P> The Kerala High Court has the jurisdiction of the state of Kerala . Each of the districts has a District Court . </P> <P> At the time of formation, Kerala had only five districts: Malabar (part of the erstwhile Madras State), Thiruvananthapuram, Kollam, Kottayam and Thrissur (together constituting the erstwhile Travancore - Cochin). On 1 January 1957, the Malabar district was divided into the districts of Kozhikode, Palakkad, and Kannur . Alappuzha district was carved out of erstwhile Kottayam and Kollam districts on 17 August 1957 . Ernakulam district was formed on 1 April 1958, carving out of parts of erstwhile Thrissur and Kottayam districts . Malappuram district was formed on 6 June 1969 with Ernad and Tirur taluks of the erstwhile Kozhikode district and Perinthalmanna and Ponnani taluks of Palakkad district . Idukki district was formed on 26 January 1972 with Devikulam, Udumbanchola and Peermedu taluks of the erstwhile Kottayam district and Thodupuzha taluk of the erstwhile Ernakulam district . Wayanad district was formed on 1 November 1980 as the 12th district in Kerala by carving out areas from Kozhikode and Kannur districts . Pathanamthitta district was formed on 1 November 1982 carving out the entire Pathanamthitta taluk and nine villages of Kunnathur taluk from Kollam district, entire Thiruvalla taluk and part of Chenganur and Mavelikkara taluks from Alapphuzha district and parts of Idukki district . Kasaragod district was formed on 24 May 1984 as the 14th revenue district by carving out a major portion of the erstwhile Kannur district . </P> <Table> <Tr> <Th> Code </Th> <Th> District </Th> <Th> Headquarters </Th> <Th> Established </Th> <Th> Subdivisions </Th> <Th> Population (2011) </Th> <Th> Area </Th> <Th> Population Density (2011) </Th> <Th> District Collector </Th> </Tr> <Tr> <Td> AL </Td> <Td> Alappuzha </Td> <Td> Alappuzha </Td> <Td> 000000001957 - 08 - 17 - 0000 17 Aug 1957 </Td> <Td> <Ul> <Li> 6 Taluks <Ul> <Li> Ambalapuzha (Alappuzha) </Li> <Li> Chengannur </Li> <Li> Cherthala </Li> <Li> Karthikappally (Haripad) </Li> <Li> Kuttanad (Mankombu) </Li> <Li> Mavelikkara </Li> </Ul> </Li> </Ul> </Td> <Td> 2,121,943 </Td> <Td> 1,414 km (546 sq mi) </Td> <Td> 1,501 / km (3,890 / sq mi) </Td> <Td> Veena Madhavan </Td> </Tr> <Tr> <Td> ER </Td> <Td> Ernakulam </Td> <Td> Kakkanad </Td> <Td> 000000001958 - 04 - 01 - 0000 1 Apr 1958 </Td> <Td> <Ul> <Li> 7 Taluks <Ul> <Li> Aluva </Li> <Li> Kanayannur (Ernakulam) </Li> <Li> Kochi (Fort Kochi) </Li> <Li> Kothamangalam </Li> <Li> Kunnathunad (Perumbavoor) </Li> <Li> Muvattupuzha </Li> <Li> North Paravur </Li> </Ul> </Li> </Ul> </Td> <Td> 3,279,860 </Td> <Td> 3,068 km (1,185 sq mi) </Td> <Td> 1,069 / km (2,770 / sq mi) </Td> <Td> Mohammed Y . Safirulla K . </Td> </Tr> <Tr> <Td> ID </Td> <Td> Idukki </Td> <Td> Painavu </Td> <Td> 000000001972 - 01 - 26 - 0000 26 Jan 1972 </Td> <Td> <Ul> <Li> 5 Taluks <Ul> <Li> Devikulam </Li> <Li> Peermade </Li> <Li> Udumbanchola (Nedumkandam) </Li> <Li> Idukki (Painavu) </Li> <Li> Thodupuzha </Li> </Ul> </Li> </Ul> </Td> <Td> 1,107,453 </Td> <Td> 4,358 km (1,683 sq mi) </Td> <Td> 254 / km (660 / sq mi) </Td> <Td> G.R. Gokul </Td> </Tr> <Tr> <Td> KN </Td> <Td> Kannur </Td> <Td> Kannur </Td> <Td> 000000001957 - 01 - 01 - 0000 1 Jan 1957 </Td> <Td> <Ul> <Li> 4 Taluks <Ul> <Li> Thalassery </Li> <Li> Iritty </Li> <Li> Kannur </Li> <Li> Thalipparamba </Li> </Ul> </Li> </Ul> </Td> <Td> 2,525,637 </Td> <Td> 2,966 km (1,145 sq mi) </Td> <Td> 852 / km (2,210 / sq mi) </Td> <Td> Mir Mohammed Ali </Td> </Tr> <Tr> <Td> KS </Td> <Td> Kasaragod </Td> <Td> Kasaragod </Td> <Td> 000000001984 - 05 - 24 - 0000 24 May 1984 </Td> <Td> <Ul> <Li> 4 Taluks <Ul> <Li> Manjeshwaram (Uppala) </Li> <Li> Kasaragod </Li> <Li> Vellarikundu </Li> <Li> Hosdurg </Li> </Ul> </Li> </Ul> </Td> <Td> 1,302,600 </Td> <Td> 1,992 km (769 sq mi) </Td> <Td> 654 / km (1,690 / sq mi) </Td> <Td> Jeevan Babu </Td> </Tr> <Tr> <Td> KL </Td> <Td> Kollam </Td> <Td> Kollam </Td> <Td> 000000001956 - 11 - 01 - 0000 1 Nov 1956 (1 July 1949) </Td> <Td> <Ul> <Li> 6 Taluks <Ul> <Li> Kollam (Paravur, Chathannoor) </Li> <Li> Karunagappally </Li> <Li> Kunnathur (Sasthamkotta) </Li> <Li> Kottarakkara </Li> <Li> Punalur </Li> <Li> Pathanapuram </Li> </Ul> </Li> </Ul> </Td> <Td> 2,629,703 </Td> <Td> 2,491 km (962 sq mi) </Td> <Td> 1,056 / km (2,740 / sq mi) </Td> <Td> T. Mithra </Td> </Tr> <Tr> <Td> KT </Td> <Td> Kottayam </Td> <Td> Kottayam </Td> <Td> 000000001956 - 11 - 01 - 0000 1 Nov 1956 () </Td> <Td> <Ul> <Li> 5 Taluks <Ul> <Li> Changanasserry </Li> <Li> Kanjirappally </Li> <Li> Kottayam </Li> <Li> Vaikom </Li> <Li> Meenachil (Palai) </Li> </Ul> </Li> </Ul> </Td> <Td> 1,979,384 </Td> <Td> 2,208 km (853 sq mi) </Td> <Td> 896 / km (2,320 / sq mi) </Td> <Td> C.A. Latha </Td> </Tr> <Tr> <Td> KZ </Td> <Td> Kozhikode </Td> <Td> Kozhikode </Td> <Td> 000000001957 - 01 - 01 - 0000 1 Jan 1957 </Td> <Td> <Ul> <Li> 4 Taluks <Ul> <Li> Kozhikode </Li> <Li> Thamarassery </Li> <Li> Koyilandy </Li> <Li> Vatakara </Li> </Ul> </Li> </Ul> </Td> <Td> 3,089,543 </Td> <Td> 2,344 km (905 sq mi) </Td> <Td> 1,318 / km (3,410 / sq mi) </Td> <Td> N. Prasanth </Td> </Tr> <Tr> <Td> MA </Td> <Td> Malappuram </Td> <Td> Malappuram </Td> <Td> 000000001969 - 06 - 16 - 0000 16 Jun 1969 </Td> <Td> <Ul> <Li> 7 Taluks <Ul> <Li> Nilambur </Li> <Li> Manjeri (Eranad) </Li> <Li> Kondotty </Li> <Li> Perinthalmanna </Li> <Li> Ponnani </Li> <Li> Tirur </Li> <Li> Tirurangadi </Li> </Ul> </Li> </Ul> </Td> <Td> 4,110,956 </Td> <Td> 3,550 km (1,370 sq mi) </Td> <Td> 1,158 / km (3,000 / sq mi) </Td> <Td> A. Shainamol </Td> </Tr> <Tr> <Td> PL </Td> <Td> Palakkad </Td> <Td> Palakkad </Td> <Td> 000000001957 - 01 - 01 - 0000 1 Jan 1957 </Td> <Td> <Ul> <Li> 6 Taluks <Ul> <Li> Alathur </Li> <Li> Chittur </Li> <Li> Palakkad </Li> <Li> Pattambi </Li> <Li> Ottappalam </Li> <Li> Mannarkkad </Li> </Ul> </Li> </Ul> </Td> <Td> 2,810,892 </Td> <Td> 4,480 km (1,730 sq mi) </Td> <Td> 627 / km (1,620 / sq mi) </Td> <Td> P. Marykutty </Td> </Tr> <Tr> <Td> PT </Td> <Td> Pathanamthitta </Td> <Td> Pathanamthitta </Td> <Td> 000000001982 - 11 - 01 - 0000 1 Nov 1982 </Td> <Td> <Ul> <Li> 6 Taluks <Ul> <Li> Adoor </Li> <Li> Konni </Li> <Li> Kozhencherry (Pathanamthitta) </Li> <Li> Ranni </Li> <Li> Mallappally </Li> <Li> Thiruvalla </Li> </Ul> </Li> </Ul> </Td> <Td> 1,195,537 </Td> <Td> 2,637 km (1,018 sq mi) </Td> <Td> 453 / km (1,170 / sq mi) </Td> <Td> R. Girija </Td> </Tr> <Tr> <Td> TV </Td> <Td> Thiruvananthapuram </Td> <Td> Thiruvananthapuram </Td> <Td> 000000001956 - 11 - 01 - 0000 1 Nov 1956 </Td> <Td> <Ul> <Li> 6 Taluks <Ul> <Li> Neyyattinkara </Li> <Li> Kattakada </Li> <Li> Nedumangad </Li> <Li> Thiruvananthapuram </Li> <Li> Chirayinkeezhu (Attingal) </Li> <Li> Varkala </Li> </Ul> </Li> </Ul> </Td> <Td> 3,307,284 </Td> <Td> 2,192 km (846 sq mi) </Td> <Td> 1,509 / km (3,910 / sq mi) </Td> <Td> Venkatesapathy S . </Td> </Tr> <Tr> <Td> TS </Td> <Td> Thrissur </Td> <Td> Thrissur </Td> <Td> 000000001956 - 11 - 01 - 0000 1 Nov 1956 (1 Jul 1949) </Td> <Td> <Ul> <Li> 6 Taluks <Ul> <Li> Kodungallur </Li> <Li> Mukundapuram (Irinjalakuda) </Li> <Li> Chalakudy </Li> <Li> Chavakkad </Li> <Li> Thalapilly (Wadakkancheri) </Li> <Li> Thrissur </Li> </Ul> </Li> </Ul> </Td> <Td> 3,110,327 </Td> <Td> 3,032 km (1,171 sq mi) </Td> <Td> 1,026 / km (2,660 / sq mi) </Td> <Td> Dr. A. Kowsigan </Td> </Tr> <Tr> <Td> WA </Td> <Td> Wayanad </Td> <Td> Kalpetta </Td> <Td> 000000001980 - 11 - 01 - 0000 1 Nov 1980 </Td> <Td> <Ul> <Li> 3 Taluks <Ul> <Li> Mananthavady </Li> <Li> Sultan Battery </Li> <Li> Vythiri (Kalpetta) </Li> </Ul> </Li> </Ul> </Td> <Td> 816,558 </Td> <Td> 2,131 km (823 sq mi) </Td> <Td> 383 / km (990 / sq mi) </Td> <Td> B.S. Thirumeni </Td> </Tr> <Tr> <Th> Total </Th> <Th>--</Th> <Th>--</Th> <Th>--</Th> <Th>--</Th> <Th> 33,387,677 </Th> <Th> 38,863 km (15,005 sq mi) </Th> <Th> 859.11 / km (2,225.1 / sq mi) </Th> <Th>--</Th> </Tr> </Table> <Tr> <Th> Code </Th> <Th> District </Th> <Th> Headquarters </Th> <Th> Established </Th> <Th> Subdivisions </Th> <Th> Population (2011) </Th> <Th> Area </Th> <Th> Population Density (2011) </Th> <Th> District Collector </Th> </Tr>

Which one is the largest district in kerala