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


  • Grandparents Day

    Grandparents Day

    Students and Staff in grades Pre-K3, Pre-K4, Kindergarten, First Grade, & Second Grade celebrated Grandparents Day on Wednesday, October 12, 2016.

  • St. Mary’s 35th Annual Steeple Chase

    St. Mary’s 35th Annual Steeple Chase

    St. Mary's hosted their 35th annual Steeple Chase. Afterwards, students were given medals and ribbons for participating. A big thanks to our sponsors, Ryan & Jen Spies for organizing the wonderful event, and to all [...]

  • SMS Cross Country Invitational

    SMS Cross Country Invitational

    Students from St. Mary School had a Pep Assembly to wish the Cross Country Team good luck!

  • STEM for Kids

    STEM for Kids

    St. Mary Students were given the opportunity to join STEM for Kids, which focuses on Science, Technology, Engineering, and Math.

  • St. Mary Prayer Partners

    St. Mary Prayer Partners

    Students from St. Mary School, met with their prayer partners on the first weeks of school.

  • St Patrick’s Irish Invitational Track Meet  Friday May 27, 2016

    St Patrick’s Irish Invitational Track Meet Friday May 27, 2016

    St Patrick’s Irish Invitational Track Meet Friday May 27, 2016 The meet is at Monterey Stadium. Field events begin at 4pm, running events at 5:30pm. If you are participating in any field events(high jump, long [...]

  • Dollar Casual Day April 22nd

    Dollar Casual Day April 22nd

    Student council is planning a dollar casual day on Friday, April 22nd. Please have your child bring a dollar in by April 21st. Money should be brought to homeroom teachers. If students do not bring [...]

  • Summer School Registration coming soon

    Summer School Registration coming soon

    Our annual Summer School program will run from July 11-July 22. Registration forms will be sent home in the family envelope on April 20th. Be on the look out for this exciting learning opportunity!

  • Dollar Casual Day for December 11

    Dollar Casual Day for December 11

    Dear Parents/Guardians, Student Council has planned another Dollar Casual Day for Wednesday, December 9th. In order to participate in this optional casual day students will have to bring in one dollar by Tuesday, December 8th. [...]

  • Echo Food Donations & Casual Day

    Echo Food Donations & Casual Day

    The student council has decided to have a donation dress down day on Thursday, November 19th. Students may wear jeans and appropriate shirts. In order for a child to wear casual they will need to [...]


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