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List of districts of Tamil Nadu

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Field	Value
name	Districts of Tamil Nadu
map	Tamil Nadu districts map.svg
category	Districts
territory	Tamil Nadu
current_number	38 districts
population_range	Perambalur – 565,223 (lowest); Chennai – 6,748,026 (highest)
area_range	Chennai – 462.3 km2 (smallest); Dindigul – 6289.1 km2 (largest)
government	Government of Tamil Nadu
subdivision	List of revenue divisions in Tamil Nadu
caption	Districts of Tamil Nadu

The Indian state of Tamil Nadu is divided into 38 districts. Districts are the major administrative divisions of a state and are further sub-divided into smaller taluks.

During the British Raj, 12 districts of the erstwhile Madras Presidency had their boundaries within the present-day Tamil Nadu. Post the Indian Independence in 1947 and the political integration, the Madras Province inherited parts of the earlier Madras Presidency. Following the adoption of the Constitution of India in 1950, the Madras State was formed, which was further reorganized in 1953 and 1956. After the reorganization of Indian states in 1956, the state had 13 re-organized districts, which were further divided later over the years.

Between 1960 and 1980, three additional districts were formed. In the late eighties, five more districts were bifurcated from existing districts. Ten more districts were formed in the nineties, taking the total count to 30. Three new districts were bifurcated in the 2000s. In 2019–20, five more districts were formed for a total of 38 districts.

History

Before 1947

Districts of Madras in 1956 with 2009 boundaries in gray

During the British Raj, the Madras Presidency was made up of 26 districts, 12 of which were part of the boundaries of the present-day Tamil Nadu, namely, Chingleput, Coimbatore, Nilgiris, North Arcot, Madras, Madura, Ramnad, Salem, South Arcot, Tanjore, Tinnevely, and Trichinopoly.

1947–56

After the Indian Independence on 15 August 1947, the Madras Presidency became the Madras Province of the Dominion of India. The princely state of Pudukottai acceded to the Indian Union on 4 March 1948 and was made as a part of the Trichinopoly district. When the new Constitution of India came into force on 26 January 1950, the Madras Province became the Madras State of the Republic of India. The Madras State included most of the present-day Tamil Nadu, Coastal Andhra and Rayalaseema regions of the present-day Andhra Pradesh, the Malabar region of the present-day Kerala, Bellary and South Canara districts of the present-day Karnataka. The Coastal Andhra and Rayalaseema regions were separated to form the new Andhra State in 1953.

As a result of the re-organization of states in 1956, South Canara and Bellary districts were merged with Mysore State, which became Karnataka and the Malabar district was added to the State of Travancore-Cochin to form Kerala. The Tamil speaking regions of Kanyakumari, which were earlier part of Travancore-Cochin, were merged to the Madras State. After the reorganisation, the Madras state had 13 districts namely: Chingleput, Coimbatore, Kanyakumari, Madras, Madurai, Nilgiris, North Arcot, Ramanathapuram, Salem, South Arcot, Thanjavur, Tiruchirappalli and Tirunelveli.

1957–89

Animation showing the division of districts in Tamil Nadu from 1956 to 2009.

On 2 October 1965, Dharmapuri district was bifurcated from the erstwhile Salem district comprising Dharmapuri, Harur, Hosur, and Krishnagiri taluks.
In 1969, the Madras State was renamed as Tamil Nadu.
On 14 January 1974, Pudukkottai district was formed from the parts of Tiruchirappalli and Thanjavur districts comprising Kulathur, Thirumayam, Alangudi, and Aranthangi taluks.
On 31 August 1979, Erode district was bifurcated from the erstwhile Coimbatore district comprising Gobichettipalayam, and Erode taluks.
On 8 March 1985, Sivaganga and Virudhunagar districts were formed from the erstwhile Ramanathapuram district. Sivaganga comprised Tirupattur, Karaikudi, Devakottai, Sivaganga, Manamadurai, and Ilayangudi taluks and Virudhunagar comprised Srivilliputhur, Virudhunagar, Tiruchuli, Aruppukottai, Sattur, and Rajapalayam taluks.
On 15 September 1985, Dindigul district was bifurcated from the erstwhile Madurai district comprising Dindigul, Palani, and Kodaikanal taluks.
On 20 October 1986, Thoothukudi district was split from the erstwhile Tirunelveli district comprising Thoothukudi, Ottapidaram, and Tiruvaikuntam taluks.
On 30 September 1989, Tiruvannamalai and Vellore districts were formed from the erstwhile North Arcot district. Tiruvannamalai district comprised Tiruvannamalai, Arni, Vandavasi, Cheyyar, Polur, and Chengam taluks Vellore district comprised Arakkonam, Arcot, Gudiyatham, Tirupattur, Vellore, Vaniyambadi, and Walajapet taluks.

1990–99

The 32 districts of the state in 2011.

On 18 October 1991, Nagapattinam was bifurcated from the erstwhile Thanjavur district comprising Tiruvarur, Mayiladuthurai, Manargudi, Needamangalam, Nagapattinam taluks, and Valangaiman from Kumbakonam taluk.
On 30 September 1993, Cuddalore and Viluppuram districts were formed from the erstwhile South Arcot district. Cuddalore district comprised Cuddalore, Chidambaram, and Vriddachalam taluks and Villupuram district comprised Kallakuruchi, Villupuram, Tirukkoyilur, and Tindivanam taluks.
On 30 September 1995, Karur and Perambalur districts were split from the erstwhile Tiruchirappalli district with Karur district comprising Karur, Kulithalai, and Manapparai taluks and Perambalur district comprising Perambalur, and Kunnam taluks.
On 25 July 1996, Theni district was bifurcated from the erstwhile Madurai district comprising Theni, Bodinayakanur, Periyakulam, Uthamapalayam and Andipatti taluks.
On 1 January 1997, Tiruvarur district was formed from the parts of erstwhile Nagapattinam and Thanjavur districts comprising Tiruvarur, Nannilam, Kudavasal, Needamangalam, Mannargudi, Thiruthiraipoondi taluks from Nagappatinam district and Valangaiman taluk from Thanjavur district.
On 1 January 1997, Namakkal district was bifurcated from the erstwhile Salem district comprising Namakkal, Tiruchengode, Rasipuram, and Paramathi-Velur taluks.
On 1 July 1997, Kanchipuram and Tiruvallur districts were split from the erstwhile Chengalpattu and Chennai districts with Kanchipuram district comprising Kanchipuram, Sriperumbudur, Uthiramerur, Chengalpattu, Tambaram, Tirukalukundram, Maduranthakam, and Cheyyur taluks and Tiruvallur district comprising Tiruvallur, Tiruttani, Ponneri, and Gummidipoondi taluks.

2000–present

Map showing the 38 districts of Tamil Nadu

On 9 February 2004, Krishnagiri district was bifurcated from the erstwhile Dharmapuri district comprising Krishnagiri, Hosur, Pochampalli, Uthangarai, and Denkanikottai taluks.
On 19 November 2007, Ariyalur district was bifurcated from the erstwhile Perambalur district comprising Ariyalur, Udayarpalayam, and Sendurai taluks.
On 24 October 2009, Tiruppur district was formed from the parts of Coimbatore and Erode districts comprising Tiruppur, Udumalpet taluks, parts of Palladam and Avinashi taluks of Coimbatore district, and Dharapuram, Kangeyam taluks and parts of Perundurai taluk of Erode district.
On 5 January 2018, the Chennai district was expanded by the addition of Madhavaram, Maduravoyal, Ambattur, Tiruvottriyur taluks, and parts of Ponneri taluk of Tiruvallur district along with Alandur, and Sholinganallur taluks of Kanchipuram district.
On 22 November 2019, Tenkasi district was bifurcated from the erstwhile Tirunelveli district comprising Tenkasi, Sengottai, Kadayanallur, Sivagiri, Veerakeralampudur, Sankarankovil, Thiruvenkatam, and Alangulam taluks.
On 26 November 2019, Kallakurichi district was bifurcated from the erstwhile Viluppuram district comprising Kallakurichi, Sankarapuram, Chinnasalem, Ulundurpet, Thirukovilur and Kalvarayanmalai taluks.
On 29 November 2019, Tirupattur and Ranipet districts were split from the erstwhile Vellore district with Tirupattur district comprising Tirupattur, Vaniyambadi, Natrampalli, and Ambur taluks and Ranipet district comprising Walajah, Arcot, Nemili, and Arakkonam taluks.
On 30 November 2019, Chengalpattu district was bifurcated from the erstwhile Kanchipuram district comprising Tirukalukundram, Chengalpattu, Madurantakam, Cheyyar, Tiruporur, Tambaram, Pallavaram, and Vandalur taluks.
On 24 March 2020, Mayiladuthurai district was formed from the erstwhile Nagapattinam district comprising Mayiladuthurai, Sirkazhi, Tharangambadi, and Kuthalam taluks.

List of districts

Active districts

District	Code	Headquarters	Estd.	Predecessor	Area (km2)	title=Districts of Tamil Nadu	url=https://www.tn.gov.in/district_view	publisher=Government of Tamil Nadu	access-date=1 December 2023	archive-date=27 July 2023	archive-url=https://web.archive.org/web/20230727153204/https://www.tn.gov.in/district_view	url-status=live}}	Pop.
density
(/km2)	Divisions	title=Government of Tamil Nadu–Taluks	url=https://www.cra.tn.gov.in/tn_taluks.pdf	publisher=Government of Tamil Nadu	access-date=1 April 2023	archive-date=4 October 2023	archive-url=https://web.archive.org/web/20231004172711/https://cra.tn.gov.in/tn_taluks.pdf	url-status=live}}	Assembly constituencies	Lok Sabha constituencies	Map
Ariyalur	ARI	Ariyalur	23 November 2007	Perambalur	2,027.6	754,894	372					[[File:Ariyalur in Tamil Nadu (India).svg	100px]]
Chengalpattu	CHG	Chengalpattu	29 November 2019	Kanchipuram	2,802.6	2,556,244	912					[[File:Chengalpattu in Tamil Nadu (India).svg	alt=	100px]]
Chennai
(formerly Madras)	CHN	Chennai	1 November 1956	None	462.3	6,748,026	10,052					[[File:Chennai in Tamil Nadu (India).svg	100px]]
Coimbatore	COI	Coimbatore	1 November 1956	None	4,950.7	3,458,045	699					[[File:Coimbatore in Tamil Nadu (India).svg	100px]]
Cuddalore	CUD	Cuddalore	30 September 1993	South Arcot District	3,870	2,605,914	673					[[File:Cuddalore in Tamil Nadu (India).svg	100px]]
Dharmapuri	DHA	Dharmapuri	2 October 1965	Salem	4,735.7	1,506,843	318					[[File:Dharmapuri in Tamil Nadu (India).svg	100px]]
Dindigul	DIN	Dindigul	15 September 1985	Madurai	6,289.1	2,159,775	343					[[File:Dindigul in Tamil Nadu (India).svg	100px]]
Erode	ERO	Erode	31 August 1979	Coimbatore	6,036	2,251,744	373					[[File:Erode in Tamil Nadu (India).svg	100px]]
Kallakurichi	KAL	Kallakurichi	26 November 2019	Viluppuram	3,440.8	1,370,281	398					[[File:Kallakurichi in Tamil Nadu (India).svg	100px]]
Kancheepuram	KAC	Kancheepuram	1 July 1997	Chingleput	1,800.2	1,166,401	648					[[File:Kanchipuram in Tamil Nadu (India).svg	100px]]
Kanyakumari	KAY	Nagercoil	1 November 1956	None	1,729.2	1,870,374	1,082					[[File:Kanyakumari in Tamil Nadu (India).svg	100px]]
Karur	KAR	Karur	30 September 1995	Tiruchirappalli	3,022.3	1,064,493	352					[[File:Karur in Tamil Nadu (India).svg	100px]]
Krishnagiri	KRI	Krishnagiri	9 February 2004	Dharmapuri	5,414.4	1,883,731	348					[[File:India Tamil Nadu districts Krishnagiri.svg	100px]]
Madurai	MAD	Madurai	1 November 1956	None	3,846.4	3,038,252	790					[[File:India Tamil Nadu districts Madurai.svg	100px]]
Mayiladuthurai	MAY	Mayiladuthurai	28 December 2020	Nagapattinam	1,237.1	918,356	742					[[File:Mayiladuthurai in Tamil Nadu (India).svg	100px]]
Nagapattinam	NAG	Nagapattinam	18 October 1991	Thanjavur	1,459	697,069	478					[[File:India Tamil Nadu districts Nagapattinam.svg	100px]]
Namakkal	NAM	Namakkal	1 January 1997	Salem	3,573.4	1,726,601	483					[[File:India Tamil Nadu districts Namakkal.svg	100px]]
Nilgiris	NIL	Ooty	1 November 1956	None	2,452.5	735,394	300					[[File:India Tamil Nadu districts Nilgiris.svg	100px]]
Perambalur	PER	Perambalur	30 September 1995	Tiruchirappalli	1,836.6	565,223	308					[[File:India Tamil Nadu districts Perambalur.svg	100px]]
Pudukkottai	PUD	Pudukkottai	14 January 1974	Thanjavur and Tiruchirappalli	4,847.8	1,618,345	334					[[File:Pudukottai in Tamil Nadu (India).svg	100px]]
Ramanathapuram	RAM	Ramanathapuram	1 November 1956	None	4,243.1	1,353,445	319					[[File:India Tamil Nadu districts Ramanathapuram.svg	100px]]
Ranipet	RAN	Ranipet	28 November 2019	Vellore	2,234.3	1,210,277	542					[[File:Ranipet in Tamil Nadu (India).svg	100px]]
Salem	SAL	Salem	1 November 1956	None	5,245	3,482,056	669					[[File:India Tamil Nadu districts Salem.svg	100px]]
Sivaganga	SIV	Sivaganga	15 March 1985	Ramanathapuram	4,086	1,339,101	328					[[File:India Tamil Nadu districts Sivaganga.svg	100px]]
Tenkasi	TEN	Tenkasi	22 November 2019	Tirunelveli	2,916.1	1,407,627	483					[[File:Tenkasi in Tamil Nadu (India).svg	100px]]
Thanjavur	THA	Thanjavur	1 November 1956	None	3,396.6	2,405,890	708					[[File:Thanjavur in Tamil Nadu (India).svg	100px]]
Theni	THE	Theni	25 July 1996	Madurai	3,066	1,245,899	406					[[File:Theni in Tamil Nadu (India).svg	100px]]
Thoothukudi	THO	Thoothukudi	20 October 1986	Tirunelveli	4,621	1,750,176	379					[[File:Thoothukudi in Tamil Nadu (India).svg	100px]]
Tiruchirappalli	TIC	Tiruchirappalli	1 November 1956	None	4,407	2,722,290	618					[[File:Tiruchirappalli in Tamil Nadu (India).svg	100px]]
Tirunelveli	TIN	Tirunelveli	1 November 1956	None	3842.4	1,665,253	433					[[File:Tirunelveli in Tamil Nadu (India).svg	100px]]
Tirupathur	TIA	Tirupattur	28 November 2019	Vellore	1,792.9	1,111,812	620					[[File:Tirupattur in Tamil Nadu (India).svg	100px]]
Tiruppur	TIP	Tiruppur	22 February 2009	Coimbatore and Erode	5,186.3	2,479,052	478					[[File:India Tamil Nadu districts Tiruppur.svg	100px]]
Tiruvallur	TAL	Tiruvallur	1 July 1997	Chingleput	3,444.2	3,728,104	1,082					[[File:Tiruvallur in Tamil Nadu (India).svg	100px]]
Tiruvannamalai	TAN	Tiruvannamalai	30 September 1989	North Arcot	6,191	2,464,875	398					[[File:Tiruvannamalai in Tamil Nadu (India).svg	100px]]
Tiruvarur	TAR	Thiruvarur	1 January 1997	Nagapattinam and Thanjavur	2,161	1,264,277	585					[[File:Tiruvarur in Tamil Nadu (India).svg	100px]]
Vellore	VEL	Vellore	30 September 1989	North Arcot	2,222.1	1,614,242	726					[[File:Vellore in Tamil Nadu (India).svg	100px]]
Viluppuram	VIL	Viluppuram	30 September 1993	South Arcot	3,725.5	2,093,003	562					[[File:Viluppuram in Tamil Nadu (India).svg	100px]]
Virudhunagar	VIR	Virudhunagar	15 March 1985	Ramanathapuram	4,288.0	1,942,288	453					[[File:Virudhunagar in Tamil Nadu (India).svg	100px]]

Former districts

District	Span	Successor districts	Map
Chingleput	1956–98	Kanchipuram, Chengalpattu and Tiruvallur	[[File:TN Districts Chengalpattu.png	100px]]
North Arcot	1956–89	Tiruvannamalai, Vellore, Ranipet and Tirupattur	[[File:TN Districts North Arcot.png	100px]]
South Arcot	1956–93	Cuddalore, Villupuram and Kallakurichi	[[File:TN Districts South Arcot.png	100px]]

References

Cash, Benjamin. (2007). "Cholera Seasonality in Madras (1901–1940): Dual Role for Rainfall in Endemic and Epidemic Regions". Ecohealth.
"History of Pudukottai". [[Government of Tamil Nadu]].
"Constitution of India". [[Ministry of Law and Justice (India).
"Abstract of 1951 census". [[Government of India]].
(14 September 1953). "Andhra State Act, 1953".
(14 September 1953). "States Reorganisation Act, 1956".
"1961 census". [[Government of India]].
"Dharmapuri district". [[Government of Tamil Nadu]].
(6 July 2023). "Tracing the demand to rename Madras State as Tamil Nadu". [[The Hindu]].
"About Erode district". [[Government of Tamil Nadu]].
"Sivganga district". [[Government of Tamil Nadu]].
"Virudhunagar district". [[Government of Tamil Nadu]].
"About Dindigul district". [[Government of Tamil Nadu]].
"About Thoothukudi district". [[Government of Tamil Nadu]].
"About Tiruvannamalai district". [[Government of Tamil Nadu]].
"About Vellore district". [[Government of Tamil Nadu]].
"About Nagapattinam district". [[Government of Tamil Nadu]].
"About Cuddalore district". [[Government of Tamil Nadu]].
(November 2024). "About Villupuram district". [[Government of Tamil Nadu]]}}{{Dead link.
"About Karur district". [[Government of Tamil Nadu]].
"About Perambalur district". [[Government of Tamil Nadu]].
"About Theni district". [[Government of Tamil Nadu]].
"About Tiruvarur district". [[Government of Tamil Nadu]].
"About Namakkal district". [[Government of Tamil Nadu]].
"About Tiruvallur district". [[Government of Tamil Nadu]].
"About Krishnagiri district". [[Government of Tamil Nadu]].
"About Ariyalur district". [[Government of Tamil Nadu]].
"About Tiruppur district". [[Government of Tamil Nadu]].
(5 January 2018). "Expansion of Chennai district". [[The Times of India]].
(22 November 2019). "About Tenkasi district". [[The Hindu]].
(26 November 2019). "About Kallakuruchi district". [[The New Indian Express]].
(29 November 2019). "About Tirupattur and Ranipet districts". [[The New Indian Express]].
(30 November 2019). "About Chengalpattu district". [[The Hindu]].
(24 March 2020). "About Mayiladuthurai district". [[The Hindu]].
"Districts of Tamil Nadu". [[Government of Tamil Nadu]].
"Government of Tamil Nadu–Taluks". [[Government of Tamil Nadu]].

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