Kadalaiyur is a rural village located in the Ettayapuram taluka of the Thoothukkudi district in the state of Tamil Nadu, India.

[1] Based on the 2011 census info, Kadalaiyur has a total population of 3,857 people living in approximately 1,139 households.

[2] Kadalaiyur has access to both public and private bus services.

Additionally, there is a railway station located 5–10 km from the village.

This is slightly higher than Tamil Nadu's overall average of 80.09%.