List of educational institutions in Karaikudi. Karaikudi, often referred to as "Educational City", It has many educational institutions starting few decades old to a few newly constructed ones from both government and some private sectors. Most popular 15 colleges are listed in 2023 rankings. Recently Alagappa University in Karaikudi is listed in one of the top 500 universities in the world  as per Times Higher Education listings.

Universities
 Alagappa University Karaikudi Campus.

Engineering Colleges

 Alagappa Chettiar College of Engineering and Technology Karaikudi.
 Karaikudi Institute of Technology, KIT & KIM Campus, Managiri, Karaikudi.
 Sri Rajarajan College of Engineering and Technology, Amaravathipudur, Karaikudi.

Research Institutions

 CECRI Central Electrochemical Research Institute, Karaikudi.

Arts and Science Colleges

 Alagappa Arts and Science college, Karaikudi.
 Dr Umayal Ramanathan Women's college for Arts & Science, Karaikudi.
 Nachiyappa Swamigal Arts and Science College, Koviloor, Karaikudi
 Sri Sarada Niketan College for Women, Amaravathipudur, Karaikudi.
 Vidhyaa Giri College of Arts and Science, Puduvayal, Karaikudi.

Business Schools and Colleges

 Alagappa Institute of Management, Karaikudi.
 Karaikudi Institute of Management, KIT & KIM Campus, Managiri, Karaikudi.

Law colleges

 Government Law College, Karaikudi

Agricultural colleges

 Agricultural college and Research Institute Chettinad, Karaikudi.
 Sethu Bhaskara Agricultural College and Research Foundation, Karaikudi.

Polytechnic colleges

 Alagappa Polytechnic, Karaikudi
 Annamalai Polytechnic, Chettinad
 Nachiyappa Swamigal Polytechnic College, Koviloor, Karaikudi

Schools and institutions

 Alagappa Academy C.B.S.E School, Karaikudi.
 Alagappa Matriculation & Higher Secondary School, Karaikudi.
 Alagappa Model Higher Secondary School, Karaikudi.
 Azad Matriculation Higher Secondary School, Karaikudi.
 Chellappan Vidya Mandir C.B.S.E School, Karaikudi.
 Chidambaram Chettiar Girls Higher Secondary School, Kottaiyur, Karaikudi.
 Chittal Achi Memorial High School, Kandanur, Karaikudi.
 Government Higher Secondary School, Ariyakudi, Karaikudi.
 Government Girls Higher Secondary School, Muthupattinam, Karaikudi.
 Government Higher Secondary School, Soorakkudi, Karaikudi.
 Government Higher School, O.Siruvayal, Karaikudi.
 Intel Vidyalaya Matriculation & Higher Secondary School, Ariyakudi, Karaikudi.
 Kamban Karpagam Matriculation & Higher Secondary School, Karaikudi.
 Kendriya Vidyalaya Karaikudi, C.E.C.R.I Campus, Karaikudi.
 Koviloor Andavar Matriculation & Higher Secondary School, Koviloor, Karaikudi.
 LFRC Higher Secondary school, Senjai, Karaikudi. 
 Maharishi Vidya Mandir C.B.S.E School, Karaikudi.
 Maruthamalayaan Matriculation Higher Secondary School, Anandanagar, Karaikudi.
 Muthiah Alagappa Matriculation & Higher Secondary School, Kottaiyur, Karaikudi.
 M.V Government Higher Secondary School, Muthupattinam, Karaikudi.
 Ramanathan chettiar Corporation High School, Karaikudi. (Formerly, Ramanathan chettiar Municipal High School, Karaikudi.)
 Ramanathan Chettiar Higher Secondary School, Puduvayal, Karaikudi.
 Sahayamatha Matriculation & Higher Secondary School, Karaikudi.
 S.M.S.V Government Higher Secondary School, Muthupattinam, Karaikudi.
 St. Michael Matriculation Higher Secondary School, Ariyakudi, Karaikudi.
 Sri Kalaivani Vidyalaya Matriculation Higher Secondary School, Senjai, Karaikudi.
 Sri Raghavendra Matriculation Higher Secondary School, Gandhipuram, Karaikudi.
 Subbaiya Ambalam Matriculation Higher Secondary School, Kottaiyur, Karaikudi.
 Thanjavur Arunachalam Chettiyar Government Higher Secondary School, Kottaiyur, Karaikudi.
 Vidhyagiri Matriculation Higher Secondary School, Muthupattinam, Karaikudi.

References 

Karaikudi
Lists of universities and colleges in India by populated place
Tamil Nadu education-related lists
Education in Sivaganga district