North Sydney Boys High School (abbreviated as NSBHS) is a government-funded, single-sex, academically selective secondary day school for boys, located at Crows Nest, on the Lower North Shore of Sydney, New South Wales, Australia.

[12] Following its closure in 1969, students from North Sydney Technical High School were transferred to NSBHS.

The campus of North Sydney Boys High School consists of a number of one- to three-storey buildings on an minimally irregular-shaped site over 2.53 hectares (6.3 acres) and situated on the southwestern corner of Falcon and Miller Streets, Crows Nest.

The built environment comprises classrooms, library, amenities, assembly hall, administration and gymnasium, various courtyards, playground areas, tennis courts, car parking, cricket practice nets and an open waste storage area.

[18] In August 1914, the Sydney Morning Herald reported that the "Girls' High School at North Sydney has been completed and occupied, while the buildings for the Boys' High School are being erected ... on the most modern lines, while the accommodation and fittings will be ample, and up to date.

It consists of a two-story brick building, with stone facings, and provides eight classrooms and staff rooms.

A government grant totalling $50,000 (Adjusted for Inflation) was provided in 1980 by the NSW State, allowing for expansion of the TAS Facilities to undergo construction of a temporary food technology kitchen that has since undergone iterations of upgrades including the recent 2022-2023 complete renovation of the kitchen facilities.

[21] North Sydney Boys High School is undergoing a major capital building program funded by the State and Federal Governments.

The project aimed to resolve shortages in adequate dedicated sporting facilities in the school, and replaced the worn out grass playing fields.

The Union was founded over seventy-five years ago as a way to "promote goodwill fellowship amongst former students of and to provide financial and other support to the School".