R. H. King Academy, formerly known as Scarborough High School, Scarborough Collegiate Institute and R.H. King Collegiate Institute is a secondary school and a de facto alternative school located in Scarborough, Toronto, Ontario, part of the Toronto District School Board. The school was established in 1922, then became a collegiate in 1930, renamed in 1954 and again in 1989. This school was named after Reginald Harold King (February 16, 1896 – November 4, 1962), a Canadian educator and classicist.

It was the first secondary school built in the former township of Scarborough and second-oldest surviving institution in Scarborough, after Agincourt Collegiate Institute. The R. H. King school motto is "Per Ardua Sapientia" which translates into Through the hard task of wisdom.