#1 Best Independent Schools in Mercer County, NJ
Princeton Day School
Independent school · Grades Pre-K–12
One of the 3 largest independent schools in New Jersey
Princeton, NJ
A+Overall grade952 students7 students per teacher
2026 lists
Best Independent Schools in Mercer County, NJ
The highest-graded schools of this kind in Mercer County, NJ. Top 6 of 6 schools.
#2 Best Independent Schools in Mercer County, NJ
Chapin School
Independent school · Grades Pre-K–8
Small classes: about 6 students per teacher
Princeton, NJ
A+Overall grade171 students6 students per teacher
#3 Best Independent Schools in Mercer County, NJ
The Lawrenceville School
Independent school · Grades 9–12
The only independent school in Lawrenceville
Lawrenceville, NJ
AOverall grade802 students7 students per teacher
#4 Best Independent Schools in Mercer County, NJ
Princeton International SCHL of Math and Science
Independent school · Grades 9–12
100% of graduates go to four-year colleges
Princeton, NJ
B+Overall grade120 students6 students per teacher
#5 Best Independent Schools in Mercer County, NJ
Scicore Academy
Independent school · Grades Pre-K–12
One school from pre-K through 12th grade
Hightstown, NJ
BOverall grade105 students10 students per teacher
#6 Best Independent Schools in Mercer County, NJ
Scicore Academy
Independent school · Grades Pre-K–12
One school from pre-K through 12th grade
Highstown, NJ
BOverall grade105 students10 students per teacher
Grades compare each school's official facts, such as class size, how long it has served families and where graduates go, with similar schools. They're a starting point: visit, ask questions and trust what you see.