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Trinity High School, founded in 1918 by the Dominican Sisters of Sinsinawa Wisconsin, is a Catholic college-preparatory high school for young women.
Trinity has earned an excellent reputation as a premier high school with a strong commitment to educating young women and preparing them for the future: intellectually, spiritually, socially, and morally.
The school community guides young women in developing skills for lifelong learning, an ethnic of care and the desire for excellence.
Each student is recognized as unique. In a nurturing, catholic, college preparatory enviornment, she is encouraged to become self-directed toward responsible participation in the Christian community in order to impact society, Church and family in the twentyfirst century.
Trinity High School, founded in 1918 by the Dominican Sisters
of Sinsinawa Wisconsin, is a Catholic college-preparatory high
school for young women. Trinity has earned an excellent reputation
as a premier high school with a strong commitment to educating
young women and preparing them for the future: intellectually,
spiritually, socially, and morally. The school community guides
young women in developing skills for lifelong learning, an ethnic
of care and the desire for excellence. Each student is recognized
as unique. In a nurturing, catholic, college preparatory
enviornment, she is encouraged to become self-directed toward
responsible participation in the Christian community in order to
impact society, Church and family in the twentyfirst century.
A 2026 parent guide to choosing the right private school, with updated admissions timelines, tuition trends, affordability strategies, and expert insights.
The average private school tuition in Cook County, IL is $13,499 for elementary schools and $19,368 for high schools (read more about average private school tuition across the country).
