# School City, state Students per class year Class year Source
1 The Harker School San Jose, CA 11.3
34 over 3 class years
Classes of 2023, 2024 & 2025 School's published list
2 Menlo School Atherton, CA 10.0
30 over 3 class years
Classes of 2023-2025 School's published list
3 Harvard-Westlake School Studio City, CA 9.0
9 over 1 class year
BY THE CLASSES OF 2021-2025 School's published list
4 Phillips Academy (Andover) Andover, MA 9.0
9 over 1 class year
Class of 2024 School's published list
5 Lakeside School Seattle, WA 7.0
35 over 5 class years
2021-2025 School's published list
6 San Francisco University High School San Francisco, CA 6.2
31 over 5 class years
2021-2025 School's published list
7 Sage Hill School Newport Coast, CA 5.3
16 over 3 class years
2023-2025 School's published list
8 Lick Wilmerding High School San Francisco, CA 5.2
21 over 4 class years
past four years School's published list
9 The Westminster Schools Atlanta, GA 4.0
20 over 5 class years
Classes 2021-2025 School's published list
10 The Webb Schools Claremont, CA 4.0
4 over 1 class year
Class of 2026 School's published list
11 Woodside Priory School Portola Valley, CA 4.0
4 over 1 class year
Class of 2026 School's published list
12 Polytechnic School Pasadena, CA 3.8
19 over 5 class years
Class of 2022-2026 School's published list
13 Riverdale Country School Bronx, NY 3.3
20 over 6 class years
Higher Ed Enrollment 2021-2026 School's published list
14 Branson School Ross, CA 3.3
10 over 3 class years
Branson Classes of 2024-2026 School's published list
15 The Lawrenceville School Lawrenceville, NJ 2.6
13 over 5 class years
the last five years School's published list
16 Punahou School Honolulu, HI 2.5
10 over 4 class years
over the last four years: 2026, 2025, 2024, and 2023 School's published list
17 University of Chicago Lab School Chicago, IL 2.5
10 over 4 class years
In the past four years School's published list
18 Kamehameha Schools Kapalama Campus Honolulu, HI 2.3
16 over 7 class years
the last seven years, 2017-2023 School's published list
19 Milton Academy Milton, MA 2.3
7 over 3 class years
2024-2026 School's published list
20 St. Mark's School of Texas Dallas, TX 2.3
7 over 3 class years
Classes of 2023-2025 School's published list
21 Groton School Groton, MA 2.2
11 over 5 class years
2022–2026 School's published list
22 College Preparatory School Oakland, CA 2.0
10 over 5 class years
the last five years School's published list
23 Spence School New York, NY 2.0
10 over 5 class years
Classes of 2021 - 2025 School's published list
24 St. Stephen's Episcopal School (Austin) Austin, TX 2.0
10 over 5 class years
Classes of 2021-2025 School's published list
25 The Mountain School of Milton Academy Vershire, VT 2.0
10 over 5 class years
2021-2025 School's published list
26 La Jolla Country Day School La Jolla, CA 2.0
6 over 3 class years
2023-2025 School's published list
27 Archer School for Girls Los Angeles, CA 2.0
2 over 1 class year
Class of '25 School's published list
28 Blair Academy Blairstown, NJ 2.0
2 over 1 class year
Class of 2026 School's published list
29 Bullis School Potomac, MD 2.0
2 over 1 class year
Class of 2026 School's published list
30 Chadwick School Palos Verdes Estate, CA 2.0
2 over 1 class year
Class of 2025 School's published list
31 Dwight-Englewood School Englewood, NJ 2.0
2 over 1 class year
Class of 2026 School's published list
32 Hopkins School New Haven, CT 2.0
2 over 1 class year
Class of 2026 School's published list
33 Marlborough School Los Angeles, CA 2.0
2 over 1 class year
Class of 2026 School's published list
34 Peddie School Hightstown, NJ 2.0
2 over 1 class year
Class of 2026 School's published list
35 Princeton Day School Princeton, NJ 2.0
2 over 1 class year
Class of 2026 School's published list
36 Santa Margarita Catholic High School Rancho Santa Margarita, CA 2.0
2 over 1 class year
Class of 2025 School's published list
37 St Ignatius College Prep Chicago, IL 2.0
2 over 1 class year
CLASS OF 2026 School's published list
38 St. Paul Academy and Summit School St. Paul, MN 2.0
2 over 1 class year
Class of 2025 School's published list
39 Stevenson School Pebble Beach, CA 2.0
2 over 1 class year
Class of 2025 School's published list
40 The Columbus Academy Gahanna, OH 2.0
2 over 1 class year
Class of 2026 School's published list
41 The International School of San Francisco San Francisco, CA 2.0
2 over 1 class year
Class of 2026 School's published list
42 The Waterford School Sandy, UT 2.0
2 over 1 class year
Class of 2025 School's published list
43 Eastside Preparatory School Kirkland, WA 1.8
9 over 5 class years
2021-2025 School's published list
44 Loyola High School Los Angeles, CA 1.8
9 over 5 class years
2020-24 School's published list
45 St. John's School Houston, TX 1.8
9 over 5 class years
Over the past five (2022-2026) graduating classes School's published list
46 The Head-Royce School Oakland, CA 1.8
9 over 5 class years
(2021–25) School's published list
47 Albuquerque Academy Albuquerque, NM 1.8
7 over 4 class years
The classes of 2023-26 have matriculated at the following colleges and universities School's published list
48 Crossroads School Santa Monica, CA 1.7
5 over 3 class years
classes of 2023-25 School's published list
49 The Hockaday School Dallas, TX 1.7
5 over 3 class years
2024 – 2026 School's published list
50 Westridge School Pasadena, CA 1.7
5 over 3 class years
2021-2023 School's published list

The 50 largest of 147 ranked private schools.

Also published, with a total but no class-year window we can read, so not ranked: Pierrepont School (7).

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