DeLaSalle opened in 1900 and has been administered by the Christian Brothers throughout its history. The school's current president is Barry Lieske, AFSC. Lieske has been an administrator at DeLaSalle since 1982 and has served as principal (chief operations officer) from 1993 to 2012. Enrollment peaked at 1654 boys in 1964, dropped to the range of 400–500 by the early 1970s despite the 1971–72 advent of co-education, and continued to decline to a 70-year low of 306 in 1991. Over the past two decades DeLaSalle's enrollment has climbed, and the school now receives an average of 400 applications each year for ninth grade admission. Strategic plans from 2000, 2007, 2012 and 2017 are based upon an optimum overall enrollment of 750–800 students.