
The CYO exists to provide opportunities for youth to develop strong moral character, self worth, interpersonal competence, and a commitment to caring for others and their community through activities of a social, educational, and recreational nature based on Christian principles that reinforce societal values.
St. Thomas offers the following CYO activities:
| Baseball | Cheerleading | Soccer | Track |
| Basketball | Forensics | Softball | Volleyball |
Other extra curricular activities for students are:
| Band | Brownies | Cub Scouts | Girl Scouts |
| Boy Scouts | Choir | Daisy Scouts | Knightly News Club |
| Yearbook Staff |