There are approximately 500 students in grades Pre-K(4) through 8th attending St. Joseph School. The students come from Baltimore County, Baltimore City, and Harford County. They represent a diverse ethnic, social, economic, and religious population. The school receives services for Title I and ESOL for students who qualify.

The student to teacher ratio is 18/1. With the addition of the Instructional Assistants, the overall student to adult ratio becomes 13/1