North Sydney Girls' High School (abbreviated as NSGHS, more commonly known as NSG) is a government-funded single-sex academically selective secondary day school for girls, located in Crows Nest, in Sydney, New South Wales, Australia. Established in 1914, the school caters for approximately 910 students from Year 7 to Year 12. Admission to the school is based entirely on academic results through the Selective High School Placement Test undertaken by students in Year 6. In 2025, North Sydney Girls was ranked fourth among all high schools in Sydney.