About
Mission, History, Heritage

School History

What's in a name?

We serve more than 580 students from the Napa Valley as well as the neighboring Solano County and Sonoma Valley.  We have a strong commitment to serve those who could not otherwise afford a quality Catholic secondary school experience with one third of our student body receiving tuition assistance. The school operates a small on-campus boarding program for both domestic and international students as well as an international host family program. We offer a college preparatory curriculum, a competitive interscholastic athletic program, a highly regarded performing arts department, and an array of co-curricular opportunities.  The campus is comprised of 40 acres and situated in northwest corner of the city of Napa. 

As a part of the Diocese of Santa Rosa, Justin-Siena is accredited by the Western Association of Schools and Colleges (WASC) and the Western Catholic Education Association (WCEA). Justin-Siena serves a variety of students from Napa, Sonoma, and Solano Counties.

In 1966 two schools opened on adjacent campuses--Justin High School (for boys) sponsored by the De La Salle Christian Brothers and Siena High School (for girls) sponsored by the Dominican Sisters of San Rafael. The schools merged in 1972 and were co-sponsored until the end of the 2005-06 school year when the Dominican Sisters transferred their sponsorship to the De La Salle Christian Brothers. Justin-Siena High School continues today as part of a world-wide network of almost a thousand Lasallian schools found in 84 countries.

The School is administered by a President and Principal and is staffed by a dedicated community of De La Salle Christian Brothers, Dominican Sisters of San Rafael, and lay men and women.

50th Anniversary Video | 2016-17

History Headlines

List of 8 news stories.

  • Br. Conrad with Mr. Jim Day '72 as a student in 1970

    Remembering Brother Conrad Kearney, FSC

    Director of Communications Eileen Mize
    It has been just one year since Justin-Siena celebrated its 50th anniversary, and woven through the stories and photos of those five decades is the solid presence of and the profound impact made by our dear Brother Conrad Kearney, FSC. So it is with a sense of sorrow and yet with a spirit of faith that we share the news of the passing of our dear Br. Conrad. He passed peacefully at his Mont La Salle home late Monday night, February 5, 2018.
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  • Bob Zeller in his office at Zeller, Hoff, and Zeller.

    Golden Gala Honoree: Robert H. Zeller

    In the Words of Br. Conrad: Brilliant, Reserved, Dedicated. Bob Zeller has many memories from the early days of Justin and Siena High Schools. Back in 1966, Zeller and his late wife, Inge, convinced their eldest daughter, Cathy, to enroll as a freshman at a brand new girls Catholic high school in town.
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  • Justin-Siena Nominated for Member of the Year

    Justin-Siena has been nominated for Napa Chamber of Commerce Member of the Year! Now, we need your vote! Please take a moment to cast your vote before the January 12 deadline. VOTE
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  • Principal and teacher Sister Carol Quinn in 1966

    Remembering Our Founding Principal, Sr. Carol Quinn, OP

    Eileen Mize, Director of Communications
    In the midst of a yearlong celebration of the 50th anniversary of our founding, Justin-Siena mourns the loss of an early pioneer in school history.
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  • First graduates of Siena High School

    A Brief History of Justin-Siena

    Former Principal Noel Hesser
    The founding of Justin-Siena can be traced back to the vision of Archbishop Joseph Alemany, OP, in the Gold Rush 1850s, for the expansion of Catholic education in his then frontier Archdiocese of San Francisco. Two remarkable individuals responded to Alemany’s call: Sister Mary Goemaere, OP, who arrived from Paris with a small group of sisters in 1850, and became prioress of the first group of women religious in California that would later become the Dominican Sisters of San Rafael; and Brother Justin McMahon, FSC, who with a small band of Christian Brothers, arrived at Saint Mary’s College in 1868. Br. Justin was president of St. Mary’s College and the first Provincial (Visitor) of the Christian Brothers District of San Francisco.
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  • Br. Bede Van Duren, founding principal

    Getting to Know Br. Bede, Founding Principal

    Pat O'Brien
    In 1966 Brother Bede Van Duren was appointed Principal of Justin High School and Religious Director of the Brothers’ community. He had taught at other Christian Brothers schools in California since 1956; he also held administrative posts as Vice Principal and served as basketball coach at La Salle High School in Pasadena where he had been a student favorite.
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  • Sr. Patricia Boss, OP

    In a Word: A Heritage Rooted in Lasallian and Dominican Traditions

    Former Principal Noel Hesser
    Amid a series of questions regarding tradition, mission, and memories asked of those interviewed, the chance to offer one word to describe their Justin-Siena experience often led to heartwarming stories and reminiscing.
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  • The Oberon Building in downtown Napa pictured in the early years of the last century

    Transforming Lives through Education: Exploring the partnership between the Gasser Foundation and Justin-Siena

    Director of Communications Eileen Mize
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Justin-Siena High School

Justin-Siena is a Catholic high school in the Lasallian tradition offering a college preparatory program that serves young men and women in grades 9–12.