# School City, state Students per class year Class year Source
1 Horace Mann School Bronx, NY 21.3
64 over 3 class years
Class of 2024 - 2026 Graduates School's published list
2 University of Chicago Lab School Chicago, IL 18.0
72 over 4 class years
In the past four years School's published list
3 Harvard-Westlake School Studio City, CA 14.0
14 over 1 class year
BY THE CLASSES OF 2021-2025 School's published list
4 Choate Rosemary Hall Wallingford, CT 13.2
66 over 5 class years
IN THE PAST FIVE YEARS, (CLASS OF 2022-2026) School's published list
5 Phillips Academy (Andover) Andover, MA 13.0
13 over 1 class year
Class of 2024 School's published list
6 Groton School Groton, MA 11.6
58 over 5 class years
2022–2026 School's published list
7 Middlesex School Concord, MA 11.0
11 over 1 class year
Class of 2026 School's published list
8 Pine Crest School Fort Lauderdale, FL 9.6
48 over 5 class years
2022-26 School's published list
9 Brunswick School Greenwich, CT 9.0
9 over 1 class year
Class of 2026 Matriculation; Composite Matriculation List of 2022-2026 School's published list
10 The Hotchkiss School Lakeville, CT 7.0
28 over 4 class years
Classes of 2023, 2024, 2025, and 2026 School's published list
11 St. John's School Houston, TX 6.6
33 over 5 class years
Over the past five (2022-2026) graduating classes School's published list
12 Collegiate School New York, NY 6.4
32 over 5 class years
2022-2026 School's published list
13 Menlo School Atherton, CA 5.7
17 over 3 class years
Classes of 2023-2025 School's published list
14 The Harker School San Jose, CA 5.3
16 over 3 class years
Classes of 2023, 2024 & 2025 School's published list
15 Milton Academy Milton, MA 5.0
15 over 3 class years
2024-2026 School's published list
16 Hopkins School New Haven, CT 5.0
5 over 1 class year
Class of 2026 School's published list
17 College Preparatory School Oakland, CA 4.8
24 over 5 class years
the last five years School's published list
18 San Francisco University High School San Francisco, CA 4.8
24 over 5 class years
2021-2025 School's published list
19 Noble and Greenough School Dedham, MA 4.6
23 over 5 class years
2021–2025 School's published list
20 Dalton School New York, NY 4.3
26 over 6 class years
2019-2024 School's published list
21 Blair Academy Blairstown, NJ 4.0
4 over 1 class year
Class of 2026 School's published list
22 Rye Country Day School Rye, NY 4.0
4 over 1 class year
Class of 2026 School's published list
23 St. Margaret's Episcopal School San Juan Capistrano, CA 4.0
4 over 1 class year
Class of 2026 School's published list
24 Washington International School Washington, DC 3.8
15 over 4 class years
2022–2025 School's published list
25 Ethical Culture Fieldston School New York, NY 3.6
18 over 5 class years
Classes of 2022–2026 School's published list
26 The Brearley School New York, NY 3.6
18 over 5 class years
2022–2026 School's published list
27 The Lawrenceville School Lawrenceville, NJ 3.6
18 over 5 class years
the last five years School's published list
28 Spence School New York, NY 3.4
17 over 5 class years
Classes of 2021 - 2025 School's published list
29 The Head-Royce School Oakland, CA 3.4
17 over 5 class years
(2021–25) School's published list
30 Westridge School Pasadena, CA 3.3
10 over 3 class years
2021-2023 School's published list
31 Branson School Ross, CA 3.0
9 over 3 class years
Branson Classes of 2024-2026 School's published list
32 Dwight-Englewood School Englewood, NJ 3.0
3 over 1 class year
Class of 2026 School's published list
33 Riverdale Country School Bronx, NY 2.8
17 over 6 class years
Higher Ed Enrollment 2021-2026 School's published list
34 Ransom Everglades School Miami, FL 2.8
14 over 5 class years
Classes of 2020-24 School's published list
35 Cate School Carpinteria, CA 2.6
13 over 5 class years
2022-2026 School's published list
36 St. Paul's School (NH) Concord, NH 2.5
5 over 2 class years
College Matriculation for the Forms of 2025 and 2026 (combined two-year TOTAL column) School's published list
37 Lakeside School Seattle, WA 2.2
11 over 5 class years
2021-2025 School's published list
38 The Westminster Schools Atlanta, GA 2.2
11 over 5 class years
Classes 2021-2025 School's published list
39 Francis W. Parker School Chicago, IL 2.2
9 over 4 class years
Classes of 2022-2025 School's published list
40 The Pingry School Basking Ridge, NJ 2.2
9 over 4 class years
2022-2025 School's published list
41 Belmont Hill School Belmont, MA 2.0
10 over 5 class years
2022-2026 School's published list
42 John Burroughs School Saint Louis, MO 2.0
10 over 5 class years
2021-2025 School's published list
43 The Chapin School New York, NY 2.0
10 over 5 class years
2022-2026 School's published list
44 The John Cooper School The Woodlands, TX 2.0
10 over 5 class years
Class of 2022 - 2026 School's published list
45 Northfield Mount Hermon Mount Hermon, MA 2.0
8 over 4 class years
the past four years School's published list
46 Brentwood School Los Angeles, CA 2.0
2 over 1 class year
Class of 2024 School's published list
47 Chadwick School Palos Verdes Estate, CA 2.0
2 over 1 class year
Class of 2025 School's published list
48 Edmund Burke School Washington, DC 2.0
2 over 1 class year
Class of 2024 School's published list
49 Little Red School House and Elisabeth Irwin High School New York, NY 2.0
2 over 1 class year
CLASS OF 2022 School's published list
50 Peddie School Hightstown, NJ 2.0
2 over 1 class year
Class of 2026 School's published list

The 50 largest of 173 ranked private schools.

Also published, with a total but no class-year window we can read, so not ranked: Pierrepont School (8), St Andrew'S School (4).

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

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.