Three public elementary schools serve Long Hill Township students from kindergarten to grade eight, while high school students attend Watchung Hills Regional High School in nearby Warren.

The Gillette School for kindergarten and grade one students is located at 759 Valley Road in Gillette. A nurturing environment focuses on child-centered learning, developing social skills and fostering cooperative character traits. The school also has a pre-school program for special needs students.

The Millington School houses grades two to five at 91 Northfield Road in Millington. About 420 students participate in programs that involve hands-on learning, often beyond the classroom. For instance, second graders participate in an Environmental Day, third grade students host an International Day, fourth graders have a science fair, and fifth graders learn about Early American history at Colonial Day.

A new addition in 2006 added nine classrooms and a gymnasium. Two computer labs are used by all grades, and Smartboard technology is available. Two courtyards offer outdoor learning opportunities such as a science lab with weather station. A large media center features an extensive collection of books and reference materials. Additionally, the Millington School has a fifth grade band and after-school activities providing classes in everything from cooking and digital photography to golf and robotics.

The Central School at 90 Central Avenue in Stirling is for middle school-age students in grades 6 to 8. Originally opened in 1933, it has a long history of educating generations of Long Hill residents. Today, about 375 students are taught by three grade level teams. Seventh and eighth grade students can choose to study Spanish or French as part of the World Language program. In addition to the core academic courses, cycle classes in each grade include consumer science health, music, art, family life and math lab. Horizon level courses are offered for high achieving students. The Passport course is designed for grades six and seven to empower adolescent students with trust-building activities, role playing and peer discussion groups.

High school students from Long Hill Township attend Watchung Hills Regional High School at 108 Stirling Road in Warren. A student population of about 2,000 also comes from neighboring municipalities of Green Brook, Warren and Watchung.

There are numerous co-curricular activities, sports teams, clubs and programs offered at the high school. The INTERACT Club has been recognized for their volunteer projects in the community, and the award-winning robotics team has participated in regional and national competitions.

Watchung Hills Regional High School students have consistently received academic recognition as National Merit Scholars, Intel and Siemens-Westinghouse Scholars, and a host of other distinctions in mathematics and literature. Many graduates go on to achieve greatness; the 2011 Nobel Prize in physics was awarded to a 1988 graduate of Watchung Hills Regional High School.

Another educational option for Long Hill residents is St. Vincent de Paul, a Catholic school for students in pre-kindergarten through grade eight located on Bebout Avenue in Stirling.