| Thalaignayiru | |
| Settlement Type: | Town |
| Pushpin Map: | India Tamil Nadu |
| Pushpin Map Caption: | Location in Tamil Nadu, India |
| Coordinates: | 10.5667°N 79.7667°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Nagapattinam |
| Unit Pref: | Metric |
| Population Total: | 11631 |
| Population As Of: | 2001 |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
Thalainayar (also referred to as Talanayar) is a panchayat town in Nagapattinam district in the Indian state of Tamil Nadu.It is near Vedaranyam. It is famous for its Agraharam street, which has a Ram and Siva temple.
India census,[1] Thalainayar had a population of 11,631. Males constitute 49% of the population and females 51%. Thalainayar has an average literacy rate of 67%, higher than the national average of 59.5%: male literacy is 74%, and female literacy is 59%. In Thalainayar, 13% of the population is under 6 years of age.
It is connected to lot of major towns like Thiruvarur, Mannargudi, Thiruthuraipoondi, Pattukkottai, Vailankanni, Nagapattinam, Vedaranyam and Kodikkarai.
Its well connected through newly built ECR (East Coast Road) between Chennai and Thoothukudi aka Tuticorin.There are direct buses to Coimbatore.