 With 873 students in grades 10-12, the school was classified by the NJSIAA for the 2015-16 school year as South Jersey, Group III for most athletic competition purposes, which included schools with an enrollment of 794 to 1,076 students in that grade range.The football team competes in the National Division of the 95-team West Jersey Football League superconference and was classified by the NJSIAA as South Jersey Group III for football for 2017-18.Delsea was recognized statewide by the NJSIAA as Group III winner of the 2009-10 ShopRite Cup, achieving first-place finishes in Girls Cross‐Country, Football, both Girls and Boys Indoor Relays, Girls Indoor Track and Field, Girls Outdoor Track and Field, second place Boys Outdoor Track and Field, third-place finishes in Softball (tied) and Boys Indoor Track and Field, with the addition of three points awarded for having no disqualifications during the winter season.