In September 1966, Montini Catholic High school opened its doors to 217 freshmen.

Phase II of the Capital Campaign, demolition of Dominic Hall and construction of an Academic and Administrative Center, was completed in 2009.

The school offers a number of fall, winter, spring and year-round sports for both girls and boys.

Sports offerings include: The Broncos football team began its current streak of state playoff appearances in 1993, making it to the semifinals that year.

The first football state championship was won during the 2004 season, with a 44–7 victory over Coal City in the Class 4a title game.