The Penns Grove High School Red Devils compete as one of the member schools in the
Tri-County Conference, which is comprised of public and private high schools located in
Camden,
Cape May,
Cumberland,
Gloucester and Salem counties. The conference is overseen by the
New Jersey State Interscholastic Athletic Association (NJSIAA). With 415 students in grades 10-12, the school was classified by the NJSIAA for the 2022–24 school years as Group I South for most athletic competition purposes. The football team competes in the Diamond Division of the 94-team
West Jersey Football League superconference and was classified by the NJSIAA as Group I South for football for 2024–2026, which included schools with 185 to 482 students. The girls' track team won the indoor track Group II state championship in 1981. The boys team won the Group I title in 1986. The boys' wrestling team won the South Jersey Group II state championship in 1981. The boys' track team won the Group II spring / outdoor track state championship in 1984, and won the Group I title in 1986 and 2013-2015. The team won the Group I state indoor relay championship in 1986. In 1986, the boys' track team set the New Jersey state record for most consecutive dual meet wins with 117. That same year, the track team not only went 10-0 in its dual meets but won every relay meet entered, won the Salem County Meet (10th straight), Tri-County Conference Meet (10th straight), South Jersey Group 1 sectional meet (10th straight) and its second state group title (its first coming in 1984). The 1988 baseball team won the South Jersey Group I state sectional championship with a 7-5 win against
Pitman High School. The team lost by a score of 13-5 to
Glen Ridge High School in the Group I championship game. The team had won the Group II state championship in 1958, which was the most recent time that the team had won a sectional title. The boys' cross country team won the Tri-County Diamond Division Championship in 2006 and 2007, the South Jersey Group I sectional title for outdoor track in 2007 and 2008, and a number of relays won by the Outdoor Track team. The football team won the South Jersey Group I state sectional championship in 2012, 2018 and 2019. In 1999, running back James McPherson set the South Jersey single game rushing record. Running back Aaron Hayward posted multiple 1,000 yard seasons and earned a scholarship to Rutgers University. The football team went 9-3 in 2008 reaching the school's first state championship game before falling to rival
Glassboro High School. The team was also able to win their first home playoff game in school history in the semifinals. The 2012 Red Devils football team won the South Jersey Group I state sectional championship, the program's first, defeating
Woodbury Junior-Senior High School by a score of 30-14 in the title game. The team finished the season with a perfect 12-0 record and set state records by scoring 621 points, breaking a previous record of 599 that had been set by
Bergen Catholic High School in 1998, and scoring an average of 51.7 points per game, breaking the record of 51.5 set by
Don Bosco Preparatory High School in 2003. Under Head Football Coach John Emel, Penns Grove became the first football team in South Jersey to finish a perfect 13-0. The team won the South Jersey Group I title in 2018 with a 14-7 win against
Salem High School in the playoff finals and went on to finish the season with a 13-0 record and win the South Central Group I title with a 35-26 win against
Willingboro High School. The 2019nteam won their second straight section title with a 30-0 win against
Paulsboro High School in the South Jersey Group I championship game. The girls' outdoor track and field team won the Group I state championship in 2013 and 2014. ==Marching band==