Pinjarra Senior High School is an independent high school in Pinjarra, a regional centre 86 kilometres (53 mi) south of Perth, Western Australia. The school district covers the Pinjarra and surrounding areas such as Serpentine, Dwellingup, Waroona, North Yunderup and South Yunderup. Established in 1921, the school enrolled 729 students in 2018, from Year 7 to Year 12, of whom eight percent identified as Indigenous Australians and nine percent of whom had a language background other than English.