History

The history of St. Dominic High School is part of a 75-year story of Catholic secondary education in O’Fallon. Built upon the foundation of its predecessor, Assumption High School, St. Dominic continues to express an educational vision that began in 1929. The vision set forth those many years ago was that of Catholic secondary education for all area young people. It began at Assumption Parish in O’Fallon.

In 1929, Assumption High School was established as the first parish Catholic high school in the area. It was staffed by the Sisters of the Most Precious Blood, O’Fallon. Classes took place in a four-room white school house until 1955, when a larger facility opened.

By 1961, the facilities were again inadequate to accommodate the ever-increasing enrollment. Committed to keeping open the only Catholic high school in the area, Assumption Parish petitioned the Archdiocese for assistance. Through the generosity of area families and with the help of the Archdiocese, a new high school was able to be built – St. Dominic High School. It was now a regional high school serving students from more than eleven parishes. The school received its name as an expression of gratitude to the Dominican Congregation of our Lady of the Rosary, Sparkill – the sisters who responded to Cardinal Ritter’s request to administer the school.

St. Dominic High School opened on September 4, 1962, but held its first year’s classes in the old Assumption building, while the new school was being built. Then in September of 1963, students began attending classes at #31 St. Dominic Drive, the school’s current location.

Since 1963, St. Dominic High School has grown, both in number of students and in campus area and facilities. In 2000, a new wing opened, which included eighteen classrooms and a much larger library. In 2004, our “Crusader Stadium” with new track and field was dedicated. Current enrollment is over 700.

At one time, thirteen Dominican sisters worked at St. Dominic High School.  The final Dominican, Sister Jeanne Margaret, O.P. left in 2009 after serving here for 45 years.  St. Dominic is staffed by a School Sisters of Notre Dame, an archdiocesan priest, and dedicated lay men and women. It is accredited by the North Central Association of Colleges and Universities.

Following the four pillars of the Dominican Order – Prayer, Study, Community, and Service – St. Dominic High School encourages in its students lifelong growth in faith, knowledge, leadership, and involvement. It proudly continues the mission of Catholic secondary education for area young people, which began 75 years ago at Assumption High School.


31 St. Dominic Drive | O'Fallon, MO 63366 | Phone: 636-240-8303 | Fax:636-240-9884 | info@stdominichs.org | Contact Us | Privacy Policy
St. Dominic High School is accredited by AdvancED. ©2009 St. Dominic High School