Trinity School
- Blessed Trinity Catholic High School
- Holy Trinity Catholic High School (disambiguation)
- Holy Trinity High School (disambiguation)
- Trinity Catholic School
- Trinity Christian High School (disambiguation)
- Trinity Church of England High School
- Trinity Church of England School
- Trinity College (disambiguation)
- Trinity College School
- Trinity College, Perth
- Trinity Episcopal Day School
- Trinity Grammar School (New South Wales)
- Trinity Grammar School (Victoria)
- Trinity Grammar School Preparatory School
- Trinity High School (disambiguation)
- Trinity Preparatory School
- Trinity Presbyterian School
- Trinity School (Menlo Park)
- Trinity School (New York City)
- Trinity School at Greenlawn
- Trinity School at Meadow View
- Trinity School at River Ridge
- Trinity School for Children
- Trinity School of Durham and Chapel Hill
- Trinity School of John Whitgift
- Trinity School, Belvedere
- Trinity School, Brentwood
- Trinity School, Carlisle
- Trinity School, Newbury
- Trinity School, Nottingham
- Trinity School, Teignmouth
- Trinity University (disambiguation)
- Trinity Valley School
- Woodside High School, Wood Green