The Harrisburg City Islanders have two of their own supporters groups, the City Island Hecklers (CI Hecklers) founded by "Them Hecklerz", and the Sons of the Susquehanna (SOS) founded by Tyler Knupp, Kris Ortega, Ian Goldinger, and Raymond Stellhorn former Cedar Cliff High School Students.
Ahead of the 2017 season, the newly formed Capital City Crew became the third recognized supporters group of the City Islanders [REF].