| Kottaiyur | |
| Settlement Type: | Sub Urban |
| Pushpin Map: | India Tamil Nadu |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in North Karaikudi, Tamil Nadu, India |
| Coordinates: | 10.115°N 78.791°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Sivaganga |
| Government Body: | Karthick Solai KS |
| Unit Pref: | Metric |
| Area Total Km2: | 6.75 |
| Elevation M: | 77 |
| Population Total: | 15686 |
| Population As Of: | 2023 |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
| Postal Code: | 630106 |
| Area Code Type: | Telephone code |
| Area Code: | 91 4565 |
Kottaiyur is a northern suburb of Karaikudi as well the part of Karaikudi City Municipal Corporation .The village is famous for Kottaiyur Sivan Temple, one of the master pieces of the Chettinad region. The temple and the area's old lime stone heritage buildings give Kottaiyur a unique identity. Kottaiyur is well developed and famous for its reputed educational institutions. Kottaiyur panchayat administration including the villages of Velangudi and Alagapuri is due to be merged with Karaikudi as part of the municipality expansion.[1]
Kottaiyur has an average elevation of and is located north in Karaikudi, on the Karaikudi-Trichy Highway
Indian census, Kottaiyur had a population of 14766 of which 49% was male and 51% female. The literacy rate of 75% is higher than the national average of 59.5%. Among men, the literacy rate is 79%, compared to 71% among females. 10% of the population is under six years of age.[2]
Kottaiyur have well reputed schools and colleges around its town. Lot of students from near by surrounding villages and towns are studying here.Following are notable institutions
Alagappa University second entrance with memorial arch and Dr.Alagappa Chettiyar statue is located in Kottaiyur - Sri Ram Nagar Railway gate area.