Kimball Union Academy Photo

Top 10 Best New Hampshire Private High Schools Belonging to National Association of Independent Schools (NAIS) (2025)

For the 2025 school year, there are 10 private high schools belonging to National Association of Independent Schools (NAIS) serving 4,171 students in New Hampshire. You can also find more schools membership associations in New Hampshire.
The top ranked private high schools belonging to National Association of Independent Schools (NAIS) in New Hampshire include St. Paul's School, Kimball Union Academy, and Dublin School.
The average tuition cost is $65,736, which is higher than the New Hampshire private high school average tuition cost of $31,481.
20% of private high schools belonging to National Association of Independent Schools (NAIS) in New Hampshire are religiously affiliated (most commonly Episcopal).

Top Ranked Private High Schools Belonging to National Association of Independent Schools (NAIS) in New Hampshire (2025)

School
Location
Grades
Students
The Derryfield School
The Derryfield School Photo - The Derryfield School is located in Manchester, NH. The 70+ acre campus boasts state-of-the-art facilities including a Science & Innovation Center, Athletic & Wellness Center, 400-seat Theater, and lighted turf field.
2108 River Road
Manchester, NH 03104
(603) 669-4524
Grades: 6-12
| 389 students
Brewster Academy
Brewster Academy Photo - Brewster Academy boasts strong athletic teams with 14 league titles, 17 New England tournament bids, and two national titles in the past five years.
80 Academy Drive
Wolfeboro, NH 03894
(603) 569-7200
Grades: 9-12
| 340 students
Dublin School
Dublin School Photo
(2)
18 Lehmann Way
Dublin, NH 03444
(603) 563-7075
Grades: 9-12
| 162 students
High Mowing School
High Mowing School Photo - The only International Waldorf boarding & day school in North America, High Mowing welcomes students from across the globe. Explore our 300-acre classroom. Become a citizen of the world, a steward of the land with a global perspective. Join us, get connected.
Special Program Emphasis
222 Isaac Frye Hwy
Wilton, NH 03086
(603) 654-2391
Grades: PK-12
| 361 students
Holderness School
Holderness School Photo
(Episcopal)
(2)
33 Chapel Lane
Plymouth, NH 03264
(603) 536-1257
Grades: 9-12
| 380 students
Kimball Union Academy
Kimball Union Academy Photo
64 Main Street
Meriden, NH 03770
(603) 469-2100
Grades: 9-12
| 338 students
New Hampton School
New Hampton School Photo - A spirited and supportive community.
70 Main Street
New Hampton, NH 03256
(603) 677-3401
Grades: 9-12
| 347 students
Phillips Exeter Academy
Phillips Exeter Academy Photo - Exeter students live and learn all over the world by participating in 40 off-campus programs from Iceland (shown) to South Africa to Washington, DC.
Alternative School
20 Main St
Exeter, NH 03833
(603) 777-3437
Grades: 9-12
| 1,106 students
St. Paul's School
St. Paul's School Photo - Students walking to class after Chapel.
(Episcopal)
325 Pleasant Street
Concord, NH 03301
(603) 229-4700
Grades: 9-12
| 548 students
Tilton School
Tilton School Photo - Maloney Hall is one of Tilton's newest dormitories and provides suite-style living for mainly 12th-grade and postgraduate students.
(1)
30 School Street
Tilton, NH 03276
(603) 286-1733
Grades: 9-12
| 200 students

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