Some of the school's notable alumni include the late Dame Nita Barrow, who was the first female (Right Excellent Errol Barrow's sister) governor general of Barbados, and parliamentarian Elizabeth Thompson, as well as Jason Holder Barbados and West Indian cricketer and Niko Terho, former professional footballer and actor best known for his role of Lucas Adams (aka Shep) on the hit medical drama, Gray’s Anatomy.
The school's motto is "Nisi Auxilio Dei Nihil," Latin for "Nothing Without Help From God".
In 1979 the first class of boys were admitted to the school In 2007, a two-year renovation programme came to an end.
In 2008, the school became the only one on the island to place three students in one sitting to two campuses of the United World Colleges (the UWC Movement).
The St. Michael School is divided into four competitive houses, named after queens: Boadicea (blue), Victoria (red), Anne (yellow) and Elizabeth (purple).