South Fremantle Senior High School (SFSHS) is a former comprehensive public co-educational high day school, that was located in Beaconsfield, 3.5 kilometres (2.2 mi) south-east of Fremantle in the south-western suburbs of Perth, Western Australia.

Prior to its closure, the school's catchment area covered most of the City of Fremantle and, as at Semester 2, 2013, the school had an enrolment of 324 students between Year 8 and Year 12, 28 (8.8%) of whom were Indigenous Australians.

In 2012, the school became the first officially accredited carbon neutral school in Australia, and in June that year won a World Environment Day Sustainability Leadership Award.

Entry to these programs was competitive and open to students beyond the catchment area.

Students in East Fremantle had the choice SFSHS, John Curtin College of the Arts, or Melville Senior High School, whilst students in Samson and parts of Hamilton Hill and Kardinya were only able to attend Hamilton Senior High School.