S
- Salvation Army Higher Secondary School,Kowdiar
- Santhigiri Vidya Bhavan, Pothencode
- Saraswathi Vidyalaya, Trivandrum, Vattiyoorkavu
- Sarvodaya Vidyalaya, Trivandrum, Nalanchira
- Seventh-Day Adventist High School, Tirumala. The school started in 1963
- Shri Vidyadhiraja Vidya Mandir, Vellayambalam,International school
- Sivodaya English Medium School, Pattoor
- SMV High School, Thiruvananthapuram, Over Bridge
- Sree Narayana Public School, Gurudevapuram
- Sree Narayana English Medium High School, Saradagiri, Varkala
- S. S. M. Higher Secondary School, Kochalumoodu
- St. Antony's Higher Secondary School, Valiathura
- St. Augustin's High School, Murukkumpuzha
- St. Chrysost E. M. S G. H. School, Nellimood
- St. Francis Sales Central School
- St. Francis Xavier School, Perumpazhuthoor
- St. Goretti's Higher Secondary School, Nalanchira
- St. Helen's Higher Secondary School, Kanjiramkulam
- St. Jemma Convent School, Perukavu
- St. John's School, Vettiyoorkave
- St. John's Model Higher Secondary School, Nalanchira
- St. Joseph's English Medium School, Kattachalkuzhi
- St. Joseph's English Medium School, Muttada
- St. Joseph's English Medium School, Ottashekaramangalam
- St.Joseph's High School Trivandrum
- St. Martin S E. M. School, Peyad
- St. Mary's English Medium School, Aramada
- St. Marys School, Parassala
- St. Mathew's High School, pozhiyoor
- St. Marys School, Neyyattinkara
- St. Marys School, Peyad
- St. Mary's Higher Secondary School, Pattom, Trivandrum
- St. Mary's Residential Central School, Poojappura
- St. Mary's Higher Secondary School, Vettukad
- St. Philip M. M. School, Neyyattinkara
- St. Roch's Convent, Sanghumughom
- St. Sebastians English Medium School, Varkala
- St. Shantal Senior Secondary School,Malamukal
- St. Theresa's Convent Girls Higher Secondary School, Neyyattinkara
- St. Theresas Convent Government High School, Neyyattinkara
- St. Thomas Residential School, Mukkolakkal
- St. Thomas Central School, Mukkolakkal
- Samskrithi Vidhya Kendra, Varkala
- Santhi Vidya Bhavan, Varkala
- Santhinikethan Public School, Vengannoor
- School Of Brights, Attingal
- Seethi Sahib Memorial English Medium High School, Mudapuram
- Sree Bhadra E. M. School, Nedumangad
- Sree Mannathu Padmana. Mem. School, Varkala
- Sree Ramakrishna Samskarika Samithi, Nettayam
- Sree Sankara Vidyapeetom School, Kilimanoor
- Sree Vidyadhiraja English Medium Higher Secondory School, Attingal
- Sree Vidyadhiraja Vidyabhavan, Ayrooppara
- Sri Padmanabha English Medium School, Fort
- Sri olamkera moola Higher Secondary Pallikudam, Venjaramoodu
- St. Vincent's high school, Kaniyapuram.
- St. Michel's High school, Puthencurichy
- St.Philominas Convent, Opposite Dr.Ilayathalapathi Lal Krishna's Home
- Sree Maruti Vidyalaya,Neyyattinkara.
Read more about this topic: List Of Schools In Thiruvananthapuram District