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At SJN, our history and foundation center on providing each student a safe, structured environment as a foundation for life.
Being away from home, preparing to make the most of each day, being personally responsible for making your bed, cleaning your room, folding your clothes, looking sharp and in uniform, and maintaining a rigorous schedule are the life skills that prepare our students to be high achievers for whatever they aspire to in the future.
The dormitories are secure with adult supervision, and our students develop fundamental academic habits through our required evening supervised study halls with peer and tutor resources available, and an advantageous 12-to-1 student-teacher ratio that instills high academic achievement. Experience the difference that is St. John's Northwestern.
St. John's Northwestern is proud to welcome back one of its own, Brandin Podziemski, as the keynote speaker for the Academy's 2026 Commencement Ceremony.
- 04/29/2026
Three students from St. John's Northwestern delivered standout performances at the Wisconsin School Music Association State Solo & Ensemble Festival this past Saturday, earning top placements at the highest ...morelevel of competition. hide
- 04/21/2026
St. John's Northwestern's JROTC Raiders team has earned its highest finish in school history, placing 3rd overall in the Masters Division at the 2025 U.S. Army JROTC National Raider Challenge ...moreheld at Fort Knox. hide
- 03/26/2026
As March closes, there is a natural opportunity to reflect on the contributions of women throughout history. At St. John's Northwestern, it is also a moment to recognize something taking ...moreshape within our own community. hide
- 03/12/2026
St. John's Northwestern proudly announces that its JROTC Program has earned the prestigious designation of Honor Unit with Distinction following a recent on-campus JROTC Program Accreditation inspection.
- 02/12/2026
The St. John's Northwestern Debate Team battled to a hard-fought 11 finish at the Wisconsin Interscholastic Speech & Dramatic Arts Association (WISDAA) meet on February 2, showcasing resilience, preparation, and ...morecompetitive excellence. hide
- 10/29/2025
DELAFIELD, Wis. St. John's Northwestern (SJN) senior Aidan Richards has been awarded the Lake Country Rotary Club's "Service Above Self" Award and Scholarship, a distinction recognizing students who exemplify ...moreexceptional leadership, strong character, and a lifelong commitment to service. hide
- 10/29/2025
DELAFIELD, Wis. St. John's Northwestern (SJN) is proud to announce that the Class of 2025 has earned more than $7.1 million in offered scholarships, marking a historic year of ...moreachievement. hide
- 10/29/2025
DELAFIELD, Wis. In the recently released Niche 2026 Best Schools Rankings, St John's Northwestern once again came out on top in a number of categories, most notably the Best ...moreChristian High Schools in Wisconsin for the third year in a row! hide
St. John's Northwestern (SJN) is Wisconsin's premier co-educational
college preparatory boarding and day school for grades 7-12 and
post-graduate. Established in 1884, the academy boasts a
breathtaking campus with historical buildings throughout, featuring
modern renovations.
Conveniently located in charming Delafield, Wis., SJN is dedicated
to preparing each student for success as tomorrow's global leaders.
SJN empowers young men and women to achieve their fullest potential
by blending rigorous academics, innovative programs, and
character-building leadership opportunities.
Our signature programs-Engineering, Robotics, Aviation, JROTC
Leadership, DME Basketball, and the AP Capstone Program-ignite
curiosity and foster skills that prepare our students for success
in an ever-evolving world.
Our dedicated faculty and staff are committed to providing
individualized attention to every student in a safe, structured
environment that provides a foundation for life. The academic and
leadership curricula are complemented by a strong athletic program,
character development, and a range of extracurricular
opportunities.
Average class size: 12
Average enrollment: 240
AP Capstone Diploma Program with 10 AP classes offered
Earn 50+ college credits with dual enrollment courses
100% college acceptance rate
Average 8.2 millionin scholarship awards and offers
Nearly 40 competitive, academic, and special interest clubs
like DECA, Model UN, and competitive robotics teams.
Sample of notable school alumni/alumnae:
Daniel Gerber 1916 - Founder and president of Gerber Baby Foods
Howard Woodin 1918 - Member of Marquette University Hall of Fame and Green Bay Packers Hall of Fame for football
Spencer Tracy 1919 - Distinguished actor; Academy Award winner; appeared in over 70 films
Arthur Wermuth 1932 - Major, U.S. Army; World War II hero
Edward Noble 1946 - Entrepreneur; developer; and manufacturer; served as a member of President Ronald Regan's staff
C. Roosevelt Boettiger 1948 - Grandson of President Franklin D. Roosevelt; U.S. delegate to the United Nations
William J. Janklow 1954 - Governor of South Dakota for four terms, longer than anyone in state history
Ty Warner 1962 - Founder and C.E.O. of Beanie Babies, Inc., a leader in the toy industry
Jay Graf 1966 - Founder and C.E.O. of Guidant Corp., a leader in the heart monitoring field
Martin Torrijos Espino 1981 - Former President of Panama from 2004 to 2009
How much does St. John's Northwestern Academy cost?
St. John's Northwestern Academy's tuition is approximately $45,000 for private students and $1,500 for summer students.
Who are famous alumni from St. John's Northwestern Academy?
St. John's Northwestern Academy famous alumni include: Daniel Gerber 1916, Howard Woodin 1918, Spencer Tracy 1919, Arthur Wermuth 1932, Edward Noble 1946, C. Roosevelt Boettiger 1948, William J. Janklow 1954, Ty Warner 1962, Jay Graf 1966 and Martin Torrijos Espino 1981.
Does St. John's Northwestern Academy offer a summer program?
Yes, St. John's Northwestern Academy offers a summer program. Visit their for more information.
What sports does St. John's Northwestern Academy offer?
St. John's Northwestern Academy offers 11 interscholastic sports: Archery, Baseball, Basketball, Cross Country, Drill Team, E-sports, Football, Riflery, Soccer, Tennis and Track and Field. St. John's Northwestern Academy is ranked as one of the top 20% of private schools in Wisconsin for most sports offered.
What is St. John's Northwestern Academy's ranking?
St. John''s Northwestern Academy has been an outstanding experience for our daughter. Being a private school with tuition, it has been well worth it any monetary sacrifice. Since starting in January, she has exceeded all of our expectations academically, personally, and socially. The structure, leadership, and supportive environment have helped her grow in confidence and maturity in a very short time. She has become confident, and so much more happier attending school. We are extremely grateful for the positive impact the school has had on her development and future.
- Posted by Parent - Mrs. Jennifer Frizzell
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Compare traditional private schools and microschools to understand differences in academics, class size, flexibility, cost, and student experience before choosing the best educational fit.
A second campus visit can reveal what an open house cannot. Learn what to observe, which questions to ask, and how to determine whether a private school is truly the right fit for your child.
The average private school tuition in Waukesha County, WI is $9,081 for elementary schools and $18,204 for high schools (read more about average private school tuition across the country).
