Immaculate High School is a private, Roman Catholic high school in Danbury, Connecticut, United States. Overseen by the Diocese of Bridgeport, IHS serves residents of 28 towns in the greater Danbury area. Immaculate High School, established in 1962, enrolls 400 to 500 male and female students. As of 2021, the school offers 16 different Advanced Placement (AP) courses with 132 students enrolled in at least one AP or equivalent course. Additional demographics that help define the student body identify 13% as non-Catholic, 2% as Eastern Orthodox and 85% Catholic. Student ethnicity includes 6.9% Hispanic; 11% Asian and Multi-Racial; and 3% African American. Roughly 10% of the student body are international exchange. The international student exchange program at Immaculate works with students from various countries such as China, Brazil, France, Germany, Lebanon and South Korea.