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School Profile and Accreditation

St. Petronille School, established in 1926, is a nine year (K-8th grade) Catholic day school located in Glen Ellyn, IL. St. Petronille provides: 

  • A devoted and demanding staff that offers the support and attention necessary for academic excellence and distinction.
  • A wide range of extracurricular activities to develop the social and personal skills of each student.
  • Religious instruction and opportunities for prayer and reflection that nurture the faith life of the faculty and students.

About St. Petronille School

  • Religious Affiliation: Roman Catholic, Diocese of Joliet
  • Enrollment: 489 Students, 285 Families


  • Full Day Kindergarten classes, 8:15 am to 3:15 pm. Half Day Kindergarten, 8:15 am to 12:15 pm.
  • Both full- and half-day students remain on campus for lunch and recess.
  • We have 2 Kindergarten homerooms, each with a full-time Paraprofessional (a teacher’s aide who is also a certified teacher).
  • Each Kindergarten homeroom (and teacher) will have a mix of both full- and half-day students.

First through Eighth Grade

  • Two classes per grade level in grades 1-8

Our Teaching Faculty

  • Number of Faculty and Staff: 30 Faculty and 15 Staff (10 Paraprofessionals, 5 Additional Staff)
  • Average Faculty Tenure: 10.9 years
  • Full-time nurse

School Accreditation and Associations

  • Illinois State Board of Education
  • AdvancED Accreditation (accredited 2015–2020)

About AdvancED

AdvancED provides nationally-recognized accreditation, the purpose of which is continuous school improvement focused on increasing student performance. To earn accreditation, schools must meet AdvancED’s high standards, be evaluated by a team of professionals from outside the school and implement a continuous process of school improvement.

Dedicated to advancing excellence in education through accreditation, research and professional services, AdvancED is the world's largest education community, serving and engaging 30,000 public and private schools and school systems in more than 70 countries and serving over 16 million students. AdvancED is the parent organization of the North Central Association Commission on Accreditation and School Improvement (NCA CASI), Northwest Accreditation Commission (NWAC) and the Southern Association of Colleges and Schools Council on Accreditation and School Improvement (SACS CASI).

AdvancED is a non-governmental, voluntary association of nearly 10,000 public and private elementary and secondary schools throughout the world.