For the official 2019 CHS Prom Registration Packet with complete details and ALL necessary forms, click HERE. Important Information Regarding the Collinsville High School 2019 Prom: Place and Cost: The Collinsville High School Junior/Senior Prom will be held at the Regency Conference Center in O’Fallon, Illinois. The date for Prom is Saturday, April 13, 2019. […]