Collie Senior High School is a comprehensive public co-educational high day school, located in Collie, a regional centre in the South West region, 213 kilometres (132 mi) south of Perth, Western Australia.

The first school in Collie opened in 1899, when the town was still called Coalville.

Enrolment doubled the next year and a new school house was built.

Enrolments at the school have been reasonably stable over the last few years with 597 students in 2007, 673 in 2008, 620 in 2009, 549 in 2010, 481 in 2011 and 486 in 2012.

[1] ^* The Government of Western Australia manages the Indian Ocean Territories under the Territories Law Reform Act 1992