New Jersey’s school scene stands out for its mix of top-tier public and private institutions known not just for academic success, but for fostering well-rounded students and strong community ties. Using the 2025 Niche rankings, which combine official data from the US Department of Education with thousands of real reviews from students and parents, this piece takes a closer look at the state’s leading K-12 schools, unpacking what makes them excel and how they create environments where students thrive.
The Pingry School , Basking Ridge
Ranked as the 1st best private high school in New Jersey, The Pingry School serves grades K-12 with approximately 1,207 students. Boasting a low student-teacher ratio of 6:1 and an overall A+ Niche grade, Pingry is highly praised for its rigorous academic programs, broad extracurricular offerings, and nurturing community culture. Parents and students consistently highlight the school’s rigorous yet supportive environment, fostering intellectual curiosity and character growth.
The Lawrenceville School , Lawrenceville
The Lawrenceville School holds the 2nd-best private high school ranking in the state. Enrolling about 824 students in grades 9–12, it maintains a 6:1 student-teacher ratio. Known for an expansive curriculum and excellent faculty, Lawrenceville balances academic rigor with personal development. Its strong reputation is reinforced by positive reviews noting a supportive yet challenging atmosphere.
Elite Preparatory Academy , Hopatcong
Ranked 3rd among the top private schools in New Jersey (exact rank within top 25), Elite Preparatory Academy is a smaller institution serving grades 8–12 with around 154 students. Its remarkable 5:1 student-teacher ratio and A+ grade highlight its commitment to an intimate, intellectually stimulating environment that fosters community inclusiveness and academic excellence.
Princeton International School of Mathematics and Science (PRISM), Princeton
This STEM-focused boarding school is ranked among the state’s top 4th private high schools, with an A+ overall grade. Serving about 120 students with a 6:1 ratio, PRISM is distinguished for inquiry-based learning and intensive scientific research opportunities, catering to students seeking a rigorous, focused STEM education in a close-knit setting.
Newark Academy , Livingston
Ranked 5th best private high school in New Jersey, Newark Academy serves grades 6–12 with approximately 677 students and an 8:1 student-teacher ratio. Celebrated for its diverse and inclusive student body, Newark Academy offers a strong academic program combined with a supportive community atmosphere prioritizing holistic development.
Delbarton School , Morristown
With a rank of 6th-best private high school, Delbarton educates approximately 644 students in grades 7–12, maintaining an 8:1 student-teacher ratio. The school is renowned for a comprehensive academic program enhanced by a wealth of co-curricular activities, focusing on balancing scholarship with character and leadership development.
Blair Academy , Blairstown
Blair Academy holds the 7th-best private high school spot and enrolls 467 students with a 6:1 student-teacher ratio. This boarding school is praised for its vibrant campus culture and academic rigor, offering a transformative experience that combines rigorous study with personal growth in a residential setting.
Princeton Day School, Princeton
Ranked 8th best private high school, Princeton Day School serves roughly 989 students from pre-kindergarten through 12th grade. Its 7:1 student-teacher ratio supports a challenging academic curriculum paired with extensive arts and athletics programs, fostering a well-rounded education and leadership skills.
