Barnegat High School is a comprehensive community public high school that serves students in ninth through twelfth grades from Barnegat Township, in Ocean County, in the U.S. state of New Jersey, operating as a part of the Barnegat Township School District.
 The school opened in September 2004 with the incoming freshman class only. There were no upperclassmen until the following year when the first incoming class became sophomores, and the new incoming freshmen were in place. It progressed this way until all four classes were in place beginning in September 2007.  The first graduation ceremony took place in June 2008. Barnegat students who were already attending Southern Regional High School prior to the Barnegat High School opening, remained there until their graduation. The final year that Barnegat had students attending Southern Regional was the 2006–07 school year, with 267 seniors at Southern Regional High School in Stafford Township representing the final group attending under a sending/receiving relationship with the Southern Regional School District, which has now ended. Barnegat High School is now open for grades nine through twelve, with the last group of Barnegat students at Southern Regional graduating in June 2007, and grade 12 having been added at Barnegat High School starting in September 2007.
 As of the 2021–22 school year, the school had an enrollment of 971 students and 64.0 classroom teachers (on an FTE basis), for a student–teacher ratio of 15.2:1. There were 179 students (18.4% of enrollment) eligible for free lunch and 54 (5.6% of students) eligible for reduced-cost lunch.
 The school was the 186th-ranked public high school in New Jersey out of 339 schools statewide in New Jersey Monthly magazine's September 2014 cover story on the state's "Top Public High Schools", using a new ranking methodology. The school had been ranked 183rd of 328 schools  in the state in 2012, after being ranked 193rd in 2010, out of 322 schools listed.
 Schooldigger.com ranked the school 187th out of 381 public high schools statewide in its 2011 rankings (a decrease of 36 positions from its 2010 ranking), based on the combined percentage of students classified as proficient or above proficient on the two components of the High School Proficiency Assessment (HSPA), mathematics (82.5%) and language arts literacy (89.6%).
 The school's building was completed in Barnegat Township under the supervision of the New Jersey Schools Construction Corporation. The 156,000-square-foot (14,500 m2), two-story building is located on a 66-acre (270,000 m2) campus, and includes 29 classrooms, six science labs, two technology labs, art and music rooms, cafeteria, media center, gymnasium, weight room and a 600-seat auditorium. The campus includes six athletic fields and a track. The new building opened to students in September 2004, with ribbon cutting ceremonies held on November 13, 2004. A contract for a second phase of work was awarded on October 16, 2006, and was scheduled to include 50,000 square feet (5,000 m2) of new space, including 28 additional classrooms and an alternate gymnasium.
 The Barnegat High School Bengals 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 684 students in grades 10–12, the school was classified by the NJSIAA for the 2019–20 school year as Group II for most athletic competition purposes, which included schools with an enrollment of 486 to 758 students in that grade range. The school was classified by the NJSIAA as Group III South for football for 2022–2024, which included schools with 680 to 889 students.
 The school participates as the host school / lead agency in a joint ice hockey team with Lacey Township High School. The co-op program operates under agreements scheduled to expire at the end of the 2023–24 school year.
 As of the 2009 season, 10 varsity football players had moved on to NCAA college play in the first five seasons of the program. The varsity track teams had successful 2010 spring track seasons, with the women's team going 6-1 (winning B-South) and the men's team finishing undefeated with a 7–0 record for the first time ever and winning B-South.
 Barnegat High School's music department is led by faculty members Natalie Altonjy and Anthony Orecchio. The music department offers a wide range of musical ensembles and academic classes. Instrumental ensembles include the 9th grade Concert Band and intermediate Band, directed by Orecchio. He also directs the advanced Wind Ensemble and Jazz Ensemble. Smaller groups include the Brass Ensemble and Pit Orchestra. Vocal Coordinator Altonjy leads the Chorus and Select Choir, as well as the after school Chorus Club. The ensembles perform and compete numerous times throughout the year. The department's dedication to high-quality musical performance has been recognized throughout the state.
 Academic classes offered by the music department include Intro to Music, Intro to Film,  20th Century Music, Music Theory I, AP Music Theory and Classical Guitar Workshop.
 The department also includes an award-winning marching band. The Barnegat High School Marching Bengals compete in Tournament of Bands Chapter 1 as a Group II band. In 2008 and 2009, the Marching Bengals were named the Group II Regional Champions in Chapter 1. The band currently competes in group I and placed 2nd in the Chapter I Championships with a score of 89.9. The Color Guard placed 1st. They also received Best Visual.
 The school's principal is Patrick Magee. His administration team includes two vice principals.