Governor Livingston High School is a comprehensive four-year co-educational public high school serving students in ninth through twelfth grades, located in Berkeley Heights, in Union County, in the U.S. state of New Jersey, and operating as the lone secondary school of the Berkeley Heights Public Schools.

Since the 1970s, Governor Livingston has provided programs for deaf, hard of hearing and cognitively-impaired students in the district and those who are enrolled from all over north-central New Jersey who attend on a tuition basis.

As of the 2024–25 school year, the school had an enrollment of 849 students and 81.9 classroom teachers (on an FTE basis), for a student–teacher ratio of 10.4:1. There were 20 students (2.4% of enrollment) eligible for free lunch and 6 (0.7% of students) eligible for reduced-cost lunch.

Union County Regional High School District was established in 1937, as the first regional high school district in New Jersey, for the students from the municipalities of Berkeley Heights, Clark, Garwood, Kenilworth, Mountainside, and Springfield. At that time, all students residing in the district attended Jonathan Dayton High School in Springfield. As the district began to grow, additional schools were needed. In November 1953, voters approved a $1.95 million bond referendum that included funds to purchase a site in Berkeley Heights for a third high school. In April 1957, voters approved a $3.8 million bond referendum that included funds to construct a high school on the Berkeley Heights site. The name "Governor Livingston Regional High School" was chosen in September 1959, though there was criticism about potential confusion with Livingston High School located 10 miles (16 km) away in Livingston, New Jersey. In September 1960, the school opened its doors to 800 students from Berkeley Heights and Mountainside. The regional district's superintendent at the time was Dr. Warren Davis and Frederick Aho was the first principal of the high school.

The school and its property have been expanded several times in subsequent years. In September 1960, just several weeks after opening, voters approved a $1.5 million referendum to construct two additions containing 20 classrooms, a boys' gymnasium, and a new library, as well as improve parking and athletic areas, which opened to students in September 1962 and January 1963. The school was built adjacent to an active Nike Missile Control Station in the Murray Hill section of Berkeley Heights which had opened in 1956; after the base was closed, the federal government gave the school district 6.3 acres (2.5 ha) of land that had been used for the defunct missile site. On May 4, 1971, voters approved a $4.7 million bond referendum to expand and renovate each school in the district. At Governor Livingston, the addition of an instructional media center and instrumental music room, and various renovations and expansions were completed by September 1973.

The high school's namesake is William Livingston, the first Governor of New Jersey and a signatory of the United States Constitution. The Royal Stewart tartan of the Stewart Clan (of whom Livingston was a member) is a symbol of the school and the tartan's red and blue colors are the high school's colors. The "Highlander" was chosen the school's mascot by student body vote in 1960, combining the tradition of the town's first baseball team and the location of the school at the highest point in Union County. The school adopted Claymore as the name for its yearbook.

Project Graduation, held the night of graduation and run entirely by volunteers, debuted in 1989, and provides a safe all-night celebration of each graduating class.

In May 1996, the vote to de-regionalize the school district passed and the incoming freshmen in the fall of 1997 were the first to enter Governor Livingston High School, which became part of the Berkeley Heights School District.