In January 1858, the Scottish Franciscan Sisters set up a Preparatory and Secondary School for girls at Duke Street in Kingston. The School was dedicated to and named after Our Lady of Immaculate Conception. In January 1879, the Scottish Franciscans handed over the school to the Franciscan Sisters of Allegany. Mothers Paula and Veronica set a high standard of achievement which is today still being preserved. In the summer of 1858, the school moved to Duke Street. On Saturday 23 October 1937, the ICHS was burnt to ashes in a terrible fire that started a block away at a beauty parlor. The school moved to Old Hope Road and then in 1941, the school acquired the Constant Spring Hotel which is now used for the Immaculate Conception High School and Convent. The school was separated into two sections, one section for the English speaking students of Jamaica and the other for French speaking students of Haiti. Due to the lack of Haitian students, the French section has been closed down. The school was a Boarding and Day School.
Campus
ICHS is located on a large campus with many facilities including:
For grades 7 to 11 : white short sleeved button down blouse, mid-calf length white 12 pleated skirt, royal blue tie, low brown shoes, brown socks that fold above the ankle, a house pin worn above the breast pocket.
For grades 12 and 13 : a short sleeved blue coat lined with white piping worn over a white A-line skirt, black shoes, white socks and a house badge to be pinned upon the left collar of their coat.
;Colours
Blue, white, black and brown
Clubs and Societies
The Sport Clubs are: Badminton, Karate, Hockey, Football, Netball, Track & Field, Lawn Tennis, Table Tennis, Swimming, Chess and Lacrosse. The Service and Awareness Clubs are: Immaculate Conception Environmentalists, Protecting Animal Wellness Society, Scientific Environmental Technological Health, Key Club, Interact Club, Impact Club, Heritage Club, Tourism Action Club, Girls With A Cause, Red Cross Club, Girl Guides, Campus Ministry and Octagon Club. Other Extracurricular Activities are: Animation and Graphic Design, Modern Languages, Baking, Bible Study Society of the West Indies, Writers Club, Schools Challenge Quiz, Grooming and Etiquette, Debating, The Immaculate Conception High School Symphony Orchestra, Steel Band, Guitar Club, Concert Band, Beginner Strings, The Glee Club, Immaculate Dance Troupe, Fitness Club, Inter Schools Christian Fellowship, Sixth Form Association, Drama Club, Filmmakers Society, Immaculate Reading Society, Junior Achievers, Photography Club, Science, Environment, Technology and Health Club, Medical Club, Aviation Club, Robotics Club, Pop-Band and United Nations.
Houses
There are seven houses:
The Immaculata House - named after Our Lady of Immaculate Conception. The house color is blue.
The Franciscan House named after St. Francis of Assisi. The house color is brown.
The St. Joan of Arc House - named after St. Joan of Arc of France. The house color is yellow.
The St. Clare House - named after St. Clare. The house color is green.
The St. Tekakwitha House - named after the Indian Martyr, St Tekakwitha. The house color is red.
The St. Rose of Lima House - named after the first canonized saint in the Western Hemisphere. The house color is rose-pink.
The Davidica House - named after Sister M. Davidica, former principal of ICHS. The house color is purple.
