Kamaraj College is one of several institutions run by a close group of Hindu Nadars of Thoothukudi. The individual institutions come under four societies/trusts.
Institutions run by Karapettai Paribalana Sangam (founded 1919)
- Karapettai Nadar Boys Higher Secondary School (founded 1951)
- Karapettai Nadar Girls Higher Secondary School (founded 1959)
- Karapettai Nadar Boys Primary School (founded 1922)
- Karapettai Nadar Girls Primary School (founded 1951)
Institutions run by AMM Sinnamani Nadar Society (founded 1954)
- AMM Sinnamani Nadar High School (founded 1963)
- AMM Sinnamani Nadar Primary School (founded 1963)
Institutions run by Thoothukudi Education Society (founded 1966)
- Kamaraj College (founded 1966)
- Kamaraj Womens College (founded 2021)
- Kamaraj School (founded 2003)
Institutions run by Ganesan Padmavathy Trust (founded 2008)
- Sri Saradha Nursery and Primary School (founded 2009)
- Sri Lalitha Vidhayalaya CBSE (founded 2016)