Bayview Secondary School, initially known as Bayview High School is a grade 9–12, 2-semester secondary school operated by the York Region District School Board. It is located just north of the northeast corner of Bayview Avenue and Major Mackenzie Drive in Richmond Hill, Ontario, Canada. Bayview S.S. was officially opened on March 19, 1961.

Bayview S.S. is named after the street on which it is located. Its 15-acre (61,000 m²) area used to be part of the Elliot farm.

According to the Fraser Institute, the school ranked 9th in Ontario in a Fraser Institute ranking of all Ontario Secondary Schools in 2016-17. The school does not offer an AP program, though it does have a renowned IB program, only open to students who live in the school area. Bayview S.S. ranked second nationally in the 2011 Euclid mathematics contest for grade 12 students held by the University of Waterloo. Bayview also consistently ranks well in Computer Programming competitions such as the CCC or ECOO.

Students of Bayview S.S. come from a variety of linguistic and cultural backgrounds. In 2005, in the neighbourhood around Bayview Secondary School, about 40% of residents were of Chinese ethnic origin, 8.1% were of East Indian origin, and 5.9% were of Iranian origin.