#1 Largest Private Schools in New Hampshire
Phillips Exeter Academy
Independent school · Grades 9–12
1,055 students
Exeter, NH
A+Overall grade1,055 students6 students per teacher
2026 lists
Largest Private Schools in New Hampshire
The private schools in New Hampshire with the most students. Top 50 of 91 schools.
#2 Largest Private Schools in New Hampshire
St. Pauls School
Episcopal school · Grades 9–12
548 students
Concord, NH
A+Overall grade548 students9 students per teacher
#3 Largest Private Schools in New Hampshire
Presentation of Mary Academy
Independent Catholic school · Grades Pre-K–8
439 students
Hudson, NH
BOverall grade439 students18 students per teacher
#4 Largest Private Schools in New Hampshire
Proctor Academy
Independent school · Grades 9–12
381 students
Andover, NH
A+Overall grade381 students5 students per teacher
#5 Largest Private Schools in New Hampshire
St. Thomas Aquinas High School
Diocesan school · Grades 9–12
354 students
Dover, NH
A-Overall grade354 students12 students per teacher
#6 Largest Private Schools in New Hampshire
Kimball Union Academy
Independent school · Grades 9–12
338 students
Meriden, NH
BOverall grade338 students8 students per teacher
#7 Largest Private Schools in New Hampshire
High Mowing School
Independent school · Grades Pre-K–12
333 students
Wilton, NH
B+Overall grade333 students11 students per teacher
#8 Largest Private Schools in New Hampshire
Trinity High School
Diocesan school · Grades 9–12
327 students
Manchester, NH
A+Overall grade327 students9 students per teacher
#9 Largest Private Schools in New Hampshire
Concord Christian Academy
Christian school (nondenominational) · Grades Pre-K–12
324 students
Concord, NH
B-Overall grade324 students12 students per teacher
#10 Largest Private Schools in New Hampshire
New Hampton School
Independent school · Grades 9–12
315 students
New Hampton, NH
A+Overall grade315 students5 students per teacher
#11 Largest Private Schools in New Hampshire
World Academy
Independent school · Grades K–8
309 students
Nashua, NH
B-Overall grade309 students11 students per teacher
#12 Largest Private Schools in New Hampshire
St. Joseph Regional School
Diocesan school · Grades Pre-K–12
286 students
Keene, NH
A-Overall grade286 students9 students per teacher
#13 Largest Private Schools in New Hampshire
Bishop Brady High School
Diocesan school · Grades 9–12
259 students
Concord, NH
AOverall grade259 students10 students per teacher
#14 Largest Private Schools in New Hampshire
Trinity Christian School
Baptist school · Grades K–12
244 students
Concord, NH
B-Overall grade244 students11 students per teacher
#15 Largest Private Schools in New Hampshire
South Merrimack Christian Academy
Baptist school · Grades Pre-K–12
238 students
Merrimack, NH
BOverall grade238 students8 students per teacher
#16 Largest Private Schools in New Hampshire
Cardigan Mountain School
Independent school · Grades 6–9
231 students
Canaan, NH
A+Overall gradeAll boys231 students4 students per teacher
#17 Largest Private Schools in New Hampshire
St. Patrick Academy
Independent Catholic school · Grades Pre-K–8
216 students
Portsmouth, NH
B-Overall grade216 students14 students per teacher
#18 Largest Private Schools in New Hampshire
St. Mary Academy
Diocesan school · Grades Pre-K–8
183 students
Dover, NH
A-Overall grade183 students9 students per teacher
#19 Largest Private Schools in New Hampshire
Mount Royal Academy
Independent Catholic school · Grades Pre-K–12
179 students
Sunapee, NH
A+Overall grade179 students6 students per teacher
#20 Largest Private Schools in New Hampshire
Tilton School
Independent school · Grades 9–12
175 students
Tilton, NH
A-Overall grade175 students7 students per teacher
#21 Largest Private Schools in New Hampshire
St. Joseph Regional Catholic School
Diocesan school · Grades Pre-K–8
174 students
Salem, NH
B-Overall grade174 students17 students per teacher
#22 Largest Private Schools in New Hampshire
61 South State St.
Diocesan school · Grades Pre-K–8
173 students
Concord, NH
B-Overall grade173 students28 students per teacher
#23 Largest Private Schools in New Hampshire
Dublin School
Independent school · Grades 9–12
169 students
Dublin, NH
A+Overall grade169 students6 students per teacher
#24 Largest Private Schools in New Hampshire
Tri-City Christian Academy
Calvinist school · Grades Pre-K–12
167 students
Somersworth, NH
BOverall grade167 students10 students per teacher
From official public records, updated October 2026.