St. Mary School in Janesville is located in South Central Wisconsin. We are a Catholic school that serves children in grade PreK3 through 8th grade. For over 100 years St Mary School has prepared children for excellence in an environment of caring and spirituality. We aspire to provide our students with the resources they need to lead successful Catholic/Christian lives by building faith and character as they are taught to excel academically.

Our students leave St. Mary School prepared to excel at the High school level. Many of our students graduate high school with high honors. Several have been chosen to be salutatorian and valedictorians.

Why Choose St. Mary School?

  • Small class sizes 8:1 student to teacher ratio
  • Affordable and tax deductible tuition
  • Many extracurricular activities that enhance the student experience
  • Strong, caring family atmosphere with many volunteer opportunities
  • Focus on character and citizenship through faith enrichment
  • Free 4 year old PreK in cooperation with the Janesville School district(P4J)
  • Summer school program based on experiential learning through fun activities
View School Calendar


  • Summer School

    Summer School

    Keep your child engaged and active this summer by enrolling them in St. Mary Summer School.  Classes are educational, fun and help keep your child's mind active!

  • Family Trivia Night

    Family Trivia Night

    We will be having a Family Trivia Night on Saturday, April 22 from 6:00-8:00.

  • Science Fair

    Science Fair

    Please join us for our Science Fair on Thursday, April 20th from 5:00-6:00.

  • Eucharistic Adoration

    Eucharistic Adoration

    Each Friday a group of our students attend Eucharistic Adoration. The following article explains how powerful this time with our Lord can be for children.   (Please click on the article.)   What these 11-year-old [...]

  • Student Council

    Student Council

    Student Council will have meetings from 3:00-4:00 on November 30, December 14, January 11, February 15, March 8, April 5, and May 3.


St. Mary’s School is like family: a caring environment where each child can excel academically, build lasting friendships, and develop athletically all while growing in faith.
Mark Jahnke, Student Parent
St. Mary school is a place where an excellent education happens with compassion, while developing character. I really appreciate the atmosphere of family and faith that my children continue to grow in.
Jenny McBride