Kingston Secondary School (KSS) is a high school located in Kingston, Ontario, Canada.

After the closing of Kingston Collegiate and Vocational Institute, considered the oldest public secondary school in Ontario and the second oldest in Canada, and Queen Elizabeth Collegiate and Vocational Institute students from both schools were phased into KSS.

[3] Kingston Secondary School opened to students on December 15, 2020, merging students from the closed Kingston Collegiate and Vocational Institute (KCVI) and Queen Elizabeth Collegiate and Vocational Institute (QECVI).

[3] Construction of KSS began in 2017 after the demolition of QECVI that year.

[5] Due to the COVID-19 pandemic, the date was further pushed back and the school finally opened in the 2020-21 school year.