Rutgers Preparatory School (also known as Rutgers Prep or RPS) is a private, coeducational, college preparatory day school established in 1766. The school educates students in pre-kindergarten through twelfth grade, located on a 41-acre (0.17 km²) campus along the banks of the Delaware and Raritan Canal in the Somerset section of Franklin Township, in Somerset County, in the U.S. state of New Jersey. Established in 1766, Rutgers Preparatory School is the oldest independent school in the state of New Jersey and the 16th-oldest in the country.

The school has a frequently cited student honor code, and requires its high school students to complete ten hours of community service each school year in order to advance to the next grade level. The vast majority of students take Advanced Placement (AP) courses, and the academic environment at the school is highly competitive. Rutgers Preparatory School is a member of the New Jersey Association of Independent Schools.

As of the 2023–24 school year, the school had an enrollment of 673 students (plus 36 in PreK) and 85.9 classroom teachers (on an FTE basis), for a student–teacher ratio of 7.8:1. The school's student body was 43.7% (294) Asian, 34.2% (230) White, 14.4% (97) Black, 4.0% (27) two or more races, 3.4% (294) Hispanic and 0.3% (2) Native Hawaiian / Pacific Islander. Tuition for the 2024–25 school year for grades 9-12 was set at $48,815. The school does not publicly release endowment figures; however IRS filings indicate close to $60 million in investable assets alone.