St. John's School was founded on January 29, 1952, by Arch bishop William Thomas Porter of the Society of African Missions[1] in response to the government's Accelerated Education policy of 1951.

Father Donelley served as interim head, and Rev.

Father Francis Kwamena Buah was recalled from postgraduate studies at Cork University in Ireland to head the school.

The school started with three teachers, F. K. Buah, Donelley, and John Quansah and 47 students in two temporary classrooms.

[3][4] Old Saint Kwesi Kwansa Kennedy, 2018 won the Henry Godson-Afful award of the best performing WASSCE student and was also adjudged the 3rd Best in West Africa 2018 with 8A's[5][6][7]