Students are divided into four houses, which serve intramural athletics purposes within the primary school. The houses, named after the first four headmasters of the school, are Lucas (yellow), Macaulay (red), Wanstall (green) and Speirs (blue). The Selwyn House Gryphons have fielded strong athletic teams in recent decades and their traditional rivals in sports are Lower Canada College and Loyola High School. The school remains one of only three all-male educational institutions left in Quebec. They host co-ed events with sister schools Miss Edgar's and Miss Cramp's School and The Study.