Group of SJN students walking


Only St. John’s Northwestern offers a Military Academy and a Prefect Academy

We are more than a military school. Since 1884, we’ve guided young people from all over the world on the path to adulthood, preparing them for college and beyond. As a private, independent boarding and day school for boys and girls, we continually innovate to serve today’s students.

The Military Academy, grades 7-12, challenges cadets to excel at leadership of self and others

The Prefect Academy, grades 7-12, challenges students to stand out as positive role models within their community

Students at gym

Diverse, tight-knit community opens a world of opportunity

Students come to us from across the United States and around the globe. While many graduates are admitted to the five military service academies, most advance to the colleges, universities, and professional schools of their choice.

Marching band

Structured, supportive environment builds character and confidence

Traditional college prep education at St. John’s Northwestern is structured around our four pillars: academics, athletics and wellness, leadership growth, and spiritual and character development. Boys and girls are guided to look within and discover their unique strengths, learning to lead and inspire others by their own example.

Alumni Gate

Accreditation and memberships

  • Independent Schools Association of the Central States
  • National Association of Independent Schools
  • Association of Military Schools & Colleges of the United States
  • Wisconsin Independent Schools Association
  • Midwest Boarding Schools
  • The Association of Boarding Schools
  • The College Board