In July 2008, new state funding was secured and on October 5, 2009, a groundbreaking ceremony was held at the site of the new high school located on Belvidere Road in Lopatcong Township.

Then-Governor Jon Corzine was in attendance as well as former Governor James Florio, Phillipsburg School District Superintendent Mark B. Miller and then-State Education Commissioner Lucille Davy.

[21] The new campus had been expected to cost $174.4 million and was planned to hold a 326,000 sq ft (30,300 m2) school and seven athletic fields.

[24] The Phillipsburg High School Stateliners[3] compete as a member of the Skyland Conference, which is comprised of public and private high schools in Hunterdon, Somerset County and Warren counties, and operates under the supervision of the New Jersey State Interscholastic Athletic Association (NJSIAA).

[26] The football team competes in Division 5B of the Big Central Football Conference, which includes 60 public and private high schools in Hunterdon, Middlesex, Somerset, Union and Warren counties, which are broken down into 10 divisions by size and location.

[28] The school had been a member of the Pennsylvania Interscholastic Athletic Association's defunct East Penn Conference.

[29] The boys' basketball team won the Group III state championship in 1983, defeating Ewing High School in the tournament final.

[30] In 2005, the boys cross country team won the New Jersey Group IV state championship and placed 3rd at the Meet of Champions.

[35] Down 7-0, the 2001 team pulled ahead to win with a last-minute touchdown in a 10-7 victory against Montclair High School in the North II Group IV sectional final.

The 2018 team won the North II Group IV sectional title with a 42-7 win against Irvington High School[38] The Stateliners have an athletic rivalry with neighboring Easton Area High School in Easton, Pennsylvania, which celebrated its 100th annual football game on Thanksgiving 2006, making it one of the oldest rivalries in the nation.