Grafton High School (abbreviated as GHS) is government-funded co-educational dual modality partially academically selective and comprehensive secondary day school, located in Grafton, in the Northern Rivers region of New South Wales, Australia.

Established in 1912, the school enrolled approximately 900 students in 2018, from Year 7 to Year 12, of whom 15 percent identified as Indigenous Australians and four percent were from a language background other than English.

[3] The school is operated by the NSW Department of Education; the principal is Scott Dinham.

[2] Grafton High School was established on 1 January 1912 and opened on 1 July of that year as a formal education system was being established in New South Wales.

[4] Since at least the 1960s, but according to an attached note since 1915, the school has been home to the head of an Egyptian mummy.