The Tri-County Conference operates under the aegis of the New Jersey State Interscholastic Athletic Association.
The conference was first established in 1928, with three divisions: Royal, Diamond, and Classic.
The new division applies to all sports except Winter Track, Wrestling, Swimming, and Girls Cross-Country.
Timber Creek Regional High School announced in 2018 that they would leave the Olympic Conference and join the Tri-County Conference for the 2020–21 school year, which would have the benefit of having all three schools in the Black Horse Pike District competing in the same athletic conference.
[3] Washington Township High School, alongside the Salem County Career and Technical High School, announced in 2021 that they would leave the Olympic Conference and join the Tri-County Conference for the 2022–23 school year.