The Lacey Township High School Lions compete in Division B South of the
Shore Conference, an athletic conference comprised of public and private high schools in
Monmouth and Ocean counties along the
Jersey Shore. The league operates under the jurisdiction of the
New Jersey State Interscholastic Athletic Association (NJSIAA). With 876 students in grades 10–12, the school was classified by the NJSIAA for the 2019–20 school year as Group III for most athletic competition purposes, which included schools with an enrollment of 761 to 1,058 students in that grade range. The school was classified by the NJSIAA as Group III South for football for 2024–2026, which included schools with 695 to 882 students. The school participates as the host school / lead agency in a joint ice hockey team with
Barnegat High School. The co-op program operates under agreements scheduled to expire at the end of the 2023–24 school year. Sports offered by the high school include: The 1988 team finished the season with a 10–1 record after winning the South Jersey Group III sectional title with a 31–28 victory against
Woodrow Wilson High School in the championship game on a field goal kicked with two seconds left in the game. The 1989 team finished with a record of 11–0 after defeating Woodrow Wilson in the finals by a score of 28–28 to win the team's second consecutive South Jersey Group III title. In 2006, the Lacey Lions beat
Seneca High School 12-0 becoming the NJSIAA South Jersey Group III state champions. This is only the second time that the Lions went undefeated. It was the third state championship under Coach Lou Vircillo, the only head football coach the school has had since it opened in 1981. In 2010, the Lions football team reached the NJSIAA South Jersey Group III state championship game and defeated Delsea Regional High School 56–7, finishing a perfect 12–0 season, earning the fourth state championship under Coach Lou Vircillo, and marking the third team in school history to go undefeated. The Lions football team also reached the NJSIAA South Jersey Group III state championship game in both 2005 and 2007, but were defeated by
Delsea Regional High School (by a score of 21–6) and
Shawnee High School (losing 23–20), respectively. The field hockey team won the South Jersey Group III state sectional title in 1993, 1994 and 1995. The 1994 team finished the season with an 18-2-3 record after winning the Group III state championship game by a score of 2–1 against a
West Essex High School team led by
Michelle Vizzuso that had not lost in 86 consecutive games in a four-year span. The girls' bowling team won the Group II state championship in 2018. ==Administration==