Kadayanallur
| Kadayanallur Nickname: Jewel's city | |
|---|---|
| First Grade Municipality | |
| Coordinates: 9°04′40″N 77°20′43″E / 9.077900°N 77.345200°E | |
| Country | India | 
| State | Tamil Nadu | 
| District | Tenkasi | 
| Taluk | Kadayanallur | 
| Government | |
| • Type | First grade municipality | 
| • Body | Kadayanallur Municipality | 
| Elevation | 217 m (712 ft) | 
| Population | |
|  • Total | 90,364 (2,011) | 
| Languages தமிழ், Tamil | |
| • Official | Tamil, | 
| Time zone | UTC+5:30 (IST) | 
| PIN | 627751, 627759 | 
| Vehicle registration | TN-76 | 
| Website | http://www.kdnl.org/ / | 
Kadayanallur is a Municipality in Tenkasi district, Tamil Nadu, India. Kadayanallur is approximately 16 km from the town of Tenkasi, the district headquarters. With an area of 52 square kilometres and a population of 90,364, Kadayanallur is classified as a First Grade Municipality under Tamil Nadu's municipal code. Kadayanallur(KDNL) is the biggest as well as largest city in tenkasi district (TSI).