South Grafton High School (abbreviated as SGHS) is a government-funded co-educational comprehensive secondary day school, located in South Grafton, in the Mid North Coast region of New South Wales, Australia.

In 2023, the school enrolled approximately 712 students from Year 7 to Year 12, of whom 47 percent identified as Indigenous Australians and three percent were from a language background other than English. The school is operated by the NSW Department of Education.

• List of government schools in New South Wales: Q–Z
• List of schools in the Northern Rivers and Mid North Coast
• Education in Australia
• Grafton High School

• Official website