Tamil Nadu is the state in India, covering 130,058 sq km of Area with 72 million populations. The Religions in Tamil Nadu acquired Hinduism 88 %, Christianity 6%, and Islam 5.8%. The state holds thousands of ancient Temples in different places of the state. Chennai is the capital and largest city in Tamil Nadu and is home to 7.9 million inhabitants and the fourth-largest city in India. The long Coastline of Tamilnadu includes many urban areas, it connects cities by sea transportation. Coimbatore and Madurai are the second and third largest cities in Tamil Nadu.
| Rank | City Name | Population | Area (km²) | Density ( inhabitants/km²) | District |
|---|---|---|---|---|---|
| 1 | Chennai [Madras] | 8,653,521 | 788 | 10,972 | Chennai, Kanchipuram and Tiruvallur |
| 2 | Coimbatore | 2,136,916 | 642 | 3,327 | Coimbatore |
| 3 | Madurai | 1,465,625 | 143 | 10,218 | Madurai |
| 4 | Tiruchirappalli (Tiruchchirappalli) | 1,022,518 | 198 | 5,149 | Tiruchirappalli |
| 5 | Tiruppur (Tirupper) | 963,173 | 197 | 4,870 | Tiruppur |
| 6 | Salem | 917,414 | 115 | 7,959 | Salem |
| 7 | Erode | 521,891 | 130 | 4,000 | Erode |
| 8 | Tirunelveli | 497,826 | 135 | 3,680 | Tirunelveli |
| 9 | Vellore | 484,690 | 140 | 3,446 | Vellore |
| 10 | Thoothukkudi (Tuticorin) | 411,628 | 63 | 6,466 | Thoothukudi |
| 11 | Dindigul | 292,512 | Dindigul | ||
| 12 | Thanjavur | 291,067 | 74 | 3,916 | Thanjavur |
| 13 | Ranippettai (Ranipet) | 264,330 | 49 | 5,297 | Vellore |
| 14 | Sivakasi | 234,704 | 48 | 4,875 | Virudhunagar |
| 15 | Karur | 234,191 | Karur | ||
| 16 | Udhagamandalam (Ooty) | 233,426 | 253 | 922 | The Nilgiris |
| 17 | Hosur | 229,528 | 28 | 7,969 | Krishnagiri |
| 18 | Nagercoil | 224,849 | 24 | 9,264 | Kanyakumari |
| 19 | Kanchipuram [Kancheepuram] | 221,715 | 27 | 8,100 | Kanchipuram |
| 20 | Kumarapalayam | 195,071 | Namakkal | ||
| 21 | Karaikudi | 181,851 | 42 | 4,239 | Sivaganga |
| 22 | Neyveli | 179,150 | 145 | 1,234 | Cuddalore |
| 23 | Cuddalore | 173,636 | 27 | 6,270 | Cuddalore |
| 24 | Kumbakonam | 167,155 | 17 | 9,497 | Thanjavur |
| 25 | Tiruvannamalai | 145,278 | 13 | 10,650 | Tiruvannamalai |