Founded in 1926 by Archbishop Sebastian Messmer, the school was built on a bold vision to unite Milwaukee’s Catholic parishes and provide a high-quality education rooted in faith for the city’s immigrant families.

Under the leadership of the School Sisters of Notre Dame and the Capuchin Friars, Messmer quickly became a thriving center of academic excellence, spiritual formation, and community spirit.

By the mid-20th century, Messmer had earned a reputation for its welcoming, family-like culture and commitment to preparing students for both college and the trades. Through the Great Depression, World War II, and the changing landscape of postwar Milwaukee, the school stood as a place of hope and stability. As the city’s neighborhoods evolved, Messmer embraced new generations of students from diverse backgrounds, becoming one of Milwaukee’s most integrated Catholic high schools and a model of inclusion and faith in action.

The 1980s brought one of Messmer’s most defining moments: the “Messmer Miracle.” When the Archdiocese announced plans to close the school, a determined group of parents and alumni refused to let its mission die. Their grassroots effort not only reopened the school but also inspired a lasting sense of pride and ownership that continues today.

In the decades that followed, Messmer experienced renewed growth and recognition. Messmer High School was the first religious school accepted into the Milwaukee Parental Choice Program, opening new doors for students and families seeking a strong, faith-based education. Messmer expanded its reach, strengthened its academics, and reaffirmed its identity as an independent Catholic high school committed to serving Milwaukee’s youth.

Today, as Messmer celebrates its centennial, the mission remains the same: to prepare students for college, career, and life through faith, academics, service, and community.

From its early years serving immigrant families to its present-day commitment to educational innovation, Messmer continues to live out its promise to give every student a step ahead for the future.

Messmer High School opened its centennial year with a jubilant Mass of Thanksgiving at the Cathedral of St. John the Evangelist on September 18, 2025. 

Archbishop Jeffrey Grob presided at the Mass, concelebrated with Archbishop Emeritus Jerome Listecki, Auxiliary Bishop Jeffrey Haines, the Very Rev. Timothy Kitzke, Rev. Robert Anello, MHS ’70, Rev. Chakrit Micaphitak, CSsR, and Deacon Joe Wenzler.

The liturgy was filled with prayer and song, as the combined Gospel choirs of Messmer, Marquette University, and All Saints Catholic Church lifted their voices in glorious harmony. Their music filled the cathedral with joy and praise, setting a beautiful tone for Messmer’s yearlong celebration of 100 years of Catholic education, community, and faith.

Livestream Recording: Experience the Celebration

Photo Gallery: See the Joy of Messmer's Anniversary Mass