Harrisburg High School is a public high school in Harrisburg, Illinois, United States.AthleticsHarrisburg High School plays in the Southern Illinois River-to-River Conference.State championships Boys' baseball 1988-89 Class AA 2003-04 Class A Boys' track and field 1994-95 Class A 1998-99 Class A 2000-01 Class ANotable alumni Danny Fife Virginia Gregg John Romonosky Taryn Beal