Cosgrove High School is a government co-educational comprehensive junior secondary school located in Glenorchy, a suburb of Hobart, Tasmania, Australia.

Established in 1951 and named in honour of Sir Robert Cosgrove,[2] the school caters for approximately 200 students from Years 7 to 10.

The school is administered by the Tasmanian Department of Education.

In November 2020, a fire broke out in one of the buildings which hosted Year 9 and 10 students, as well as staff offices.

All students were temporarily relocated to Claremont College for two weeks as repairs were being done.