Cornelia Connelly School is a Catholic college-preparatory high school for girls in Anaheim, California. Established in 1961 by the Sisters of the Society of the Holy Child Jesus, it is named after Cornelia Connelly, founder of that Roman Catholic religious institute. Although located in the Roman Catholic Diocese of Orange, it is an independent school, one of ten Holy Child schools in the United States. There also are thirteen other Holy Child Schools in England, Ireland, France, Ghana, and Nigeria.
Connelly's student body consists of approximately 200 students who represent a multitude of religious and cultural traditions from Orange, Los Angeles, Riverside, and San Bernardino Counties.
Connelly is a sister school to Rosary High School in Fullerton; Rosary is diocesan whereas Connelly is independent. Connelly also has a brother school; Servite High School in Anaheim. Servite High School and Cornelia Connelly School are both independent single-sex Catholic college-prep high schools. Servite, Connelly, and Rosary unify at football games, Tri-School Theater, and school dances.
 
Academics
There is an average class size of 15-18. Cornelia Connelly School also offers national as well as international foreign exchange opportunities to their students. Students may attend various Holy Child Schools along the northern East Coast of the United States, and the Holy Child Schools in Killiney, Ireland and England. Students may spend eight weeks studying at a Holy Child School, as part of the Holy Child Network of Schools Exchange Program.
 
Notable alumni
The first two female valedictorians of Harvard University - Naomi Morita Jaszewski '82 and Susan Doherty '83.
Founder and President of Women's World Banking - Nancy Barry '67
Egyptian political journalist, blogger and activist - Gigi Ibrahim '05
Olympian and competitive swimmer - Casey Johnson '08