S
- Saad Memorial Secondary School Kiburere, Kasese
- Seroma Christian High School, Mukono
- Shimoni Demonstration Primary School and Teacher Training Centre, Kira
- Skyland High School, Lira
- Soroti Community Secondary School, Soroti, Teso
- Soroti Senior Secondary School, Soroti, Teso
- Stafford Senior School, Kitende, Wakiso, Kitende
- Stella Maris College, Mukono
- St. Andrew's Academy, Kisoro
- St. Augustine's Secondary School, Wakiso
- St Balikuddembe Secondary School, Mukono
- St Cecilia Boarding Primary school Buyamba, Rakai
- St. Charles Lwanga Secondary School, Koboko, Koboko District
- St Elizabeth's Girls' Secondary School, Kidetok, Teso
- St Francis Senior Secondary School for the Blind, Madera, Soroti District
- St Henry's College Namugongo, Namugongo
- St Henry's High School, Bulenga, Wakiso District
- St. Henry's College Kitovu, Masaka, Masaka District
- St. Henry's Girls Senior Secondary School, Buyege, Mpigi District
- St. Lawrence schools and colleges
- St. John's Secondary School, Kabuwoko, Rakai District
- St Joseph's Seminary Nyenga, Nyenga, Mukono District
- St. Joseph's Secondary School Nsambya, Nsambya, Kampala
- St. Joseph Vocational Training Centre, Kamuli
- St Kizito's Technical School, Madera, Soroti, Teso
- St Matia Kalemba Secondary School Nazigo, Mukono District
- St Mary's Prep School Zigoti, Zigoti, Mityana District
- St Mary's Senior Secondary School, Madera, Soroti, Teso
- St Mary's Secondary School, Kitende
- St. Mary's College Kisubi, Kisubi, Wakiso District
- St. Mary's Senior Secondary School, Don Bosco Namaliga-Bombo
- St. Mary's College Rushoroza, Kabale District
- St. Mbaga's College Naddangira, Kakiri, Wakiso District,
- St Paul's Seminary Roshoroza, Kabale District
- St. Peter's Technical School, Bukalagi, Gomba District
- St. Peter's College Tororo, Tororo, Tororo District
- St Peter's Comprehensive Senior Secondary School, Katakwi, Teso
- St Thomas Comprehensive Senior Secondary School, Kaberamaido, Teso
- St. Aloysius College Nyapea, Nyapea, Zombo District
Read more about this topic: List Of Schools In Uganda