| Alagappa University | |
| Mottoeng: | Excellence in Action |
| Vice Chancellor: | G. Ravi |
| Faculty: | 349[1] |
| Students: | 4831 |
| Undergrad: | 675 |
| Postgrad: | 2630 |
| Doctoral: | 1526 |
| Country: | India |
| Coor: | 10.0786°N 78.7947°W |
| Campus: | Urban (440 acres) |
| Affiliations: | UGC |
Alagappa University is a public university located in Karaikudi, Tamil Nadu, India. Originated from Alagappa Arts College, founded by Alagappa Chettiar in 1947, it was established in 1985 by an Act of the Tamil Nadu government. It was converted from a unitary type to an affiliating type by the Tamil Nadu Universities Act, 2002, with jurisdiction over arts and science colleges in the districts of Ramanathapuram district and Sivaganga district. The government colleges in the above districts have become the constituent colleges of Alagappa University.
| Nirf U 2023: | 30 |
| Nirf O 2023: | 56 |
The National Institutional Ranking Framework (NIRF) ranked Alagappa University 56th overall in India and 30th among universities in 2023.