Immaculate Conception High School is a private

Private school

Private schools, also known as independent schools or nonstate schools, are not administered by local, state or national governments; thus, they retain the right to select their students and are funded in whole or in part by charging their students' tuition, rather than relying on mandatory...

, Roman Catholic high school

High school

High school is a term used in parts of the English speaking world to describe institutions which provide all or part of secondary education. The term is often incorporated into the name of such institutions....

 in Elmhurst, Illinois

Elmhurst, Illinois

Elmhurst is a suburb of Chicago in DuPage and Cook Counties, Illinois. The population is 46,013 as of the 2008 US Census population estimate.-History:...

. It is located in the Roman Catholic Diocese of Joliet in Illinois. IC competes in the Suburban Christian Conference. The Boys athletic teams are nicknamed the "Knights", while the Girls teams are known as the "Lady Knights". The boys football team has won state championships in 2002 (class 3A) and 2008 (class 2A).
Immaculate Conception was established in 1936 by Monsignor William J. Plunket. It is the oldest Catholic, coeducational high school in DuPage County, Illinois

DuPage County, Illinois

As of the 2010 Census, the population of the county was 916,924, White Americans made up 77.9% of Dupage County's population; non-Hispanic whites represented 70.5% of the population. Black Americans made up 4.6% of the population. Native Americans made up 0.3% of Dupage County's population...

. It is also the only parish-based high school in DuPage county.