Between 1955 and 1972, renovations and additions were added to the school, including the science wing, a planetarium, and a new cafeteria.

In 2003, the planetarium was named for the school's highly inspirational and influential teacher Dennis Phillippy, however was demolished in 2007.

In 2004, former President George W. Bush visited the school, making a speech in the auditorium.

Central Dauphin High School offers a wide variety of clubs, activities and an extensive sports program which duplicates the sports offered at Central Dauphin East High School.

Efforts to consolidate some sports between the two district high schools have been resisted by parents.

Central Dauphin's music program consists of seven bands, four choirs, and three orchestras.