Immaculate Conception School, founded in August of 1924, had its first opening day of school in September of 1925.  Father Leonard Plumanns, pastor in 1911, was presented with a farewell gift of $80 from the parish.  He, in turn, gave this donation back to the parish as the initial donation toward the building of a parish school.  Ground was broken in August 1924 by Fr. R.I. Kinanne and was dedicated by Bishop Stritch on July 4, 1925.  The building consisted of four classrooms for Grades one through seven.  The Ursuline Sisters of Toledo, along with one lay woman, were the first teachers for the 106 students.

The Sisters of St. Francis, Sylvania, at the invitation of the pastor, Fr. Karl Brand, came to the school in 1929 and continued to minister in the school until June of 1994 when two Sisters of Notre Dame joined the school staff.
The closing of the 1962-1963 school year saw an end of Grades seven and eight at ICS.  This was the direct result of an increased enrollment and a lack of available space.  Beginning with the 1963-1964 school year, the school provided education to students in Grades one through six.

Responding to a need for early Catholic education, Immaculate Conception School broadened its scope to include Kindergarten in 1984.  During the 1989-1990 school year, an after-school program, Kid's Care Service, was added.  The name for the program was suggested by a sixth grade student, Amanda Puffenberger.  The 1991-1992 school year welcomed the opening of a Preschool.

Immaculate Conception School continues to work with approximately 180 students (Preschool through Grade 6) and their families in providing the best possible education.  Dedicated teachers, school staff members, and a wealth of volunteers use current teaching methods, materials, computers, and other resources to provide the children with multiple opportunities for learning.

Immaculate Conception School consists of adjoining buildings at the corners of Fourth and Madison Streets.  The school presently accommodates children in Preschool through sixth grade and includes classrooms, storage areas, a central library and technology center, gym/cafeteria, clinic, principal's office, secretary's office, conference are, and faculty lounge.  In the 1996-1997 school year, the Preschool moved to the "old" Parish Center (Madison Street) adjacent the main school building.  In the 2004-2005 school year, the Preschool moved back to the main building.