# School City, state Students per class year Class year Source
1 Brentwood School Los Angeles, CA 8.0
8 over 1 class year
Class of 2024 School's published list
2 The Hotchkiss School Lakeville, CT 4.5
18 over 4 class years
Classes of 2023, 2024, 2025, and 2026 School's published list
3 Berkshire School Sheffield, MA 4.0
4 over 1 class year
Class of 2021 School's published list
4 The Rivers School Weston, MA 3.4
17 over 5 class years
2022-2026 School's published list
5 Horace Mann School Bronx, NY 3.3
10 over 3 class years
Class of 2024 - 2026 Graduates School's published list
6 Poly Prep Country Day School Brooklyn, NY 3.0
15 over 5 class years
Classes of 2022-2026 School's published list
7 Berkeley Preparatory School Tampa, FL 3.0
3 over 1 class year
Class of 2026 School's published list
8 Harvard-Westlake School Studio City, CA 3.0
3 over 1 class year
BY THE CLASSES OF 2021-2025 School's published list
9 Rye Country Day School Rye, NY 3.0
3 over 1 class year
Class of 2026 School's published list
10 Marin Academy San Rafael, CA 2.7
8 over 3 class years
CLASSES OF 2023–2025 School's published list
11 Ethical Culture Fieldston School New York, NY 2.4
12 over 5 class years
Classes of 2022–2026 School's published list
12 Friends Seminary New York, NY 2.4
12 over 5 class years
The Classes of 2022–2026 School's published list
13 Greenwich Academy Greenwich, CT 2.4
12 over 5 class years
2022-2026 School's published list
14 The Mountain School of Milton Academy Vershire, VT 2.4
12 over 5 class years
2021-2025 School's published list
15 The Pingry School Basking Ridge, NJ 2.2
9 over 4 class years
2022-2025 School's published list
16 Noble and Greenough School Dedham, MA 2.0
10 over 5 class years
2021–2025 School's published list
17 The Hockaday School Dallas, TX 2.0
6 over 3 class years
2024 – 2026 School's published list
18 Archer School for Girls Los Angeles, CA 2.0
2 over 1 class year
Class of '25 School's published list
19 Middlesex School Concord, MA 2.0
2 over 1 class year
Class of 2026 School's published list
20 Oak Knoll School of the Holy Child Summit, NJ 2.0
2 over 1 class year
Class of 2026 School's published list
21 Pace Academy Atlanta, GA 2.0
2 over 1 class year
Class of 2026 School's published list
22 Peddie School Hightstown, NJ 2.0
2 over 1 class year
Class of 2026 School's published list
23 Phillips Academy (Andover) Andover, MA 2.0
2 over 1 class year
Class of 2024 School's published list
24 St. Luke's School (New Canaan) New Canaan, CT 2.0
2 over 1 class year
Class of 2026 / Classes 2021-2025 School's published list
25 St. Paul Academy and Summit School St. Paul, MN 2.0
2 over 1 class year
Class of 2025 School's published list
26 The Hun School of Princeton Princeton, NJ 2.0
2 over 1 class year
CLASS OF 2026 MATRICULATION School's published list
27 The Westminster Schools Atlanta, GA 1.8
9 over 5 class years
Classes 2021-2025 School's published list
28 Francis W. Parker School Chicago, IL 1.8
7 over 4 class years
Classes of 2022-2025 School's published list
29 The Potomac School Mclean, VA 1.8
7 over 4 class years
past four years School's published list
30 Branson School Ross, CA 1.7
5 over 3 class years
Branson Classes of 2024-2026 School's published list
31 Gilman School Baltimore, MD 1.6
8 over 5 class years
classes of 2020-2024 School's published list
32 The Head-Royce School Oakland, CA 1.6
8 over 5 class years
(2021–25) School's published list
33 The Lawrenceville School Lawrenceville, NJ 1.6
8 over 5 class years
the last five years School's published list
34 The Taft School Watertown, CT 1.6
8 over 5 class years
past five years (2020-2024) School's published list
35 Colorado Academy Denver, CO 1.5
6 over 4 class years
Classes 2022-2025 School's published list
36 Packer Collegiate Institute Brooklyn, NY 1.4
7 over 5 class years
2021 - 2025 School's published list
37 The Blake School Hopkins, MN 1.4
7 over 5 class years
Classes 2021-2025 School's published list
38 Belmont Hill School Belmont, MA 1.2
6 over 5 class years
2022-2026 School's published list
39 Collegiate School New York, NY 1.2
6 over 5 class years
2022-2026 School's published list
40 Maret School Washington, DC 1.2
6 over 5 class years
classes of 2022–2026 School's published list
41 Pingree School South Hamilton, MA 1.2
6 over 5 class years
2021–2025 School's published list
42 Spence School New York, NY 1.2
6 over 5 class years
Classes of 2021 - 2025 School's published list
43 Malvern Preparatory School Malvern, PA 1.2
5 over 4 class years
Classes of 2022-2025 School's published list
44 Northfield Mount Hermon Mount Hermon, MA 1.2
5 over 4 class years
the past four years School's published list
45 The Derryfield School Manchester, NH 1.2
5 over 4 class years
2022-2025 School's published list
46 Groton School Groton, MA 1.0
5 over 5 class years
2022–2026 School's published list
47 Loyola High School Los Angeles, CA 1.0
5 over 5 class years
2020-24 School's published list
48 Pine Crest School Fort Lauderdale, FL 1.0
5 over 5 class years
2022-26 School's published list
49 Polytechnic School Pasadena, CA 1.0
5 over 5 class years
Class of 2022-2026 School's published list
50 The Browning School New York, NY 1.0
5 over 5 class years
Classes of 2022-26 School's published list

The 50 largest of 143 ranked private schools.

Also published, with a total but no class-year window we can read, so not ranked: St Andrew'S School (5), Garrison Forest School (1).

All schools, public and private, and the lists of colleges that admitted each school's graduates, are on the Colgate University feeder leaderboard. More about the college: Colgate University.

Each count is copied from a list the school published about its own graduates: where they enrolled, one student at one college. The ranked figure is that count divided by the class years the school's list covers. A school that is not on this page did not publish a numbered matriculation list we could read — that is all absence means here. It is never a statement about a school's graduates. Lists of acceptances (where students were admitted, not where they enrolled) are never counted in this ranking: an acceptances list runs about three times an enrollment list, so counting the two together would compare different things. Those lists are ranked on their own, separately.