Sihlangwini High
- Region
- Lubombo
- Type
- High school
Sikanye(kaZondwako) High School
- Type
- High school
Siphocosini High School
- Type
- High school
Siphofaneni High School
- Region
- Hhohho
- Type
- High school
Siphumelele Community High
- Region
- Hhohho
- Type
- High school
Siteki Nazarene High
- Region
- Hhohho
- Type
- High school
Siyendle High
- Type
- High school
Sobokazane High School
- Region
- Hhohho
- Type
- High school
SOS High School
- Type
- High school
St Annes High
- Region
- Manzini
- Type
- High school
St Christophers High
- Type
- High school
St Francis High Schol
- Region
- Hhohho
- Type
- High school
St John Bosco High School
- Region
- Manzini
- Type
- High school
St Josephs High School
- Type
- High school
St Marks High
- Region
- Hhohho
- Type
- High school
St Marys High School
- Region
- Hhohho
- Type
- High school
St Michaels High School
- Type
- High school
St Philips High
- Region
- Lubombo
- Type
- High school
St Theresas High
- Type
- High school
St. Paul's Methodist High School
- Region
- Manzini
- Type
- High school