| Kadayal | |
| Settlement Type: | city |
| Pushpin Map: | India Tamil Nadu |
| Pushpin Map Caption: | Location in Tamil Nadu, India |
| Coordinates: | 8.4408°N 77.2594°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Kanyakumari |
| Government Type: | Municipal council |
| Governing Body: | Kadayal Municipal Council |
| Unit Pref: | Metric |
| Population Total: | 19226 |
| Population As Of: | 2011 |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
Kadayal is a city in Kanniyakumari district in the Indian state of Tamil Nadu.
India census,[1] Kadayal had a population of 19,226. Males constitute 49% of the population and females 51%. Kadayal has an average literacy rate of 77%, higher than the national average of 59.5%: male literacy is 80%, and female literacy is 74%. In Kadayal, 13% of the population is under 6 years of age.