The school was the 117th-ranked public high school in New Jersey out of 339 schools statewide in New Jersey Monthly magazine's September 2014cover story on the state's "Top Public High Schools", using a new ranking methodology. The school had been ranked 189th in the state of 328 schools in 2012, after being ranked 250th in 2010 out of 322 schools listed. The magazine ranked the school 250th in 2008 out of 316 schools. The school was ranked 251st in the magazine's September 2006 issue, which surveyed 316 schools across the state.
Athletics
The Belvidere High School County Seaters athletic teams compete in the Valley Division of the Skyland Conference, which operates under the supervision of the New Jersey State Interscholastic Athletic Association. With 359 students in grades 10-12, the school is classified by the NJSIAA for most sports as North I, Group I for most athletic competition purposes, which included schools with an enrollment of 187 to 490. Interscholastic sports offered include football, baseball, softball, basketball, cross country, swimming, cheerleading, golf, wrestling, field hockey, and soccer. The school operates as the host school / lead agency for cooperative girls and boys swimming programs with North Warren Regional High School that expires at the end of the 2019-20 school year; North Warren is the host school for a shared boys and girls lacrosse program, also expiring in 2019-20. The boys baseball team won the North II Group I state sectional championship in 1965. The girls field hockey team won the North II Group I state sectional championships in 1982, 1988, 1989, 1990, 1991 and 1996, and won the combined North I / II Group I title in 1992. The team was Group I co-champion in 1989 and won the Group I title outright in 1990. The boys wrestling team won the North II Group I state sectional championships in 1996, 1999, 2000 and 2001. The football team won the North II Group I state sectional championship in 1999. The girls soccer team won the North II, Group I state sectional championship in 2005 with a 1-0 win over North Arlington High School. The team won the North I, Group I state sectional title in a shootout after overtime ended in a 2-2 tie with Cresskill High School.
Activities and clubs
There are many clubs at Belvidere, including Marching Band, Color Guard, Madrigals, Chorus, S.T.A.N.D, Diversity Club, FFA, Student Government, a science club, a book club, a running club, Seater Scoop, HOPE Club, Leo Club, Yearbook Club, Environmental Club, National Honor Society, French National Honor Society, and others.
Administration
Core members of the school's current administration are: