The Pennington School is a private (independent), coeducational college preparatory school for day and boarding students in sixth through twelfth grades, located in Pennington, New Jersey, a small community in the northeastern United States midway between New York City and Philadelphia in Mercer County, New Jersey. The Head of School is Dr. William S. Hawkey, who assumed the position in July 2014.

As of the 2019–20 school year, the school had an enrollment of 534 students and 108.6 classroom teachers (on an FTE basis), for a student–teacher ratio of 4.9:1. The school's student body was 47.6% (254) White, 36.7% (196) two or more races, 6.9% (37) Asian, 5.2% (28) Black and 3.6% (19) Hispanic

Pennington is a member of the National Association of Independent Schools, the New Jersey Association of Independent Schools, the Association of Delaware Valley Independent Schools, and the General Board of Higher Education and Ministry of the United Methodist Church. The school has been accredited by the Middle States Association of Colleges and Schools Commission on Elementary and Secondary Schools since 1930; the accreditation expires in May 2025.