Singleton High School is a government-funded co-educational comprehensive secondary day school, located in Singleton, in the Upper Hunter region of New South Wales, Australia. Established in 1940, the school enrolled approximately 1,160 students in 2018, from Year 7 to Year 12, of whom 14 percent identified as Indigenous Australians and four percent were from a language background other than English. The school is operated by the NSW Department of Education; the principal is Joanne Scott. Singleton High School is the second biggest high school in rural New South Wales.