Seattle Preparatory School is a Jesuit Catholic 9-12 college-preparatory school in Capitol Hill, founded in 1891 by the Jesuit fathers of the Pacific Northwest. It is Seattle's oldest Catholic high school and has been co-educational since 1975. Roughly 750 students attend on the Capitol Hill campus near Volunteer Park, in the heart of the same Seattle Catholic-school corridor that includes Holy Names Academy and O'Dea High School.
Within Washington's Jesuit secondary school network, Seattle Prep is the third school in a three-school triad — Bellarmine Preparatory School in Tacoma (founded 1928) and Gonzaga Preparatory School in Spokane (founded 1887) anchor the South Sound and Inland Northwest. Each of the three is the dominant Jesuit college-prep in its region. In Seattle's broader private-school market, Seattle Prep sits alongside Bishop Blanchet (the archdiocesan co-ed flagship) and O'Dea (the archdiocesan all-boys school) as the three large Catholic 9-12 options in the city, with Holy Names Academy as the single-sex Catholic flagship for girls.
The school is NWAIS-accredited and a long-time member of the National Catholic Educational Association. Athletics compete in WIAA Class 3A. Coverage of the Seattle Catholic-HS market consistently names Seattle Prep among the top regional options for families seeking a Jesuit college-prep program, with matriculation patterns weighted toward in-state flagships, Jesuit-affiliated universities (Gonzaga, Seattle U, Loyola Marymount), and the broader Pac-12 and selective-private cohort.
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