Blacktown Boys High School (BBHS) is a government-funded single-sex academically partially selective secondary day school for boys, located in Blacktown, a western Sydney suburb of New South Wales, Australia.

Established in 1956 as Blacktown High School, the school enrolled approximately 822 students in 2022, from Year 7 to Year 12, of whom 0.02 percent identified as Indigenous Australians and 89 percent spoke English as a second or foreign language.

[2] The school is operated by the NSW Department of Education in accordance with a curriculum developed by the New South Wales Education Standards Authority.

Blacktown Boys was officially opened on 17 October 1959 by the Deputy Premier and Minister of Education, Bob Heffron.

A school cadet unit was formed in 1961, and disbanded in the 1970s as multiple fights took place.