| Sefton High School | |
|---|---|
 | |
| Location | |
 | |
Australia | |
| Coordinates | 33°52′46″S 151°0′32″E / 33.87944°S 151.00889°E |
| Information | |
| Type | Government-funded co-educational dual modality partially academically selective and comprehensive secondary day school |
| Motto | Sincerity, Scholarship, Service |
| Established | 1962 |
| Educational authority | New South Wales Department of Education |
| Principal | Kevin Humphreys
Timothy Mortimer (Deputy) Bill Dimopulos (Deputy) |
| Years | 7–12 |
| Enrolment | ~1,100 |
| Campus | Sefton |
| Colour(s) | Navy blue and black |
| Website | sefton-h |
 | |
Sefton High School is a government-funded co-educational dual modality partially academically selective and comprehensive secondary day school, located in Sefton, a suburb in western Sydney, New South Wales, Australia. Established in 1961, the school caters for approximately 1,100, students from Year 7 to Year 12 and is operated by the New South Wales Department of Education.