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Largest California Private High Schools

Name: California Average Students Per School Trends (High School)
Creator: Private School Review
License: https://www.privateschoolreview.com/terms

The average private high school in California has 255 students (2026-27).

The largest private high school in California is Mother Of Divine Grace School, with 6,206 students.

Quick Facts (26-27)

# CA Schools Ranked: 1,064
Top 20 Range (Students): 1,428–6,206
CA School Avg.: 256
National School Avg.: 244

Quick Facts (26-27)

# CA Schools Ranked: 1,064
Top 20 Range (Students): 1,428–6,206
CA School Avg.: 256
National School Avg.: 244

California Average Students Per School (Trends)

Total Growth: +23.9% (+49 since 2015)

View Data

Year	National avg	California (CA) avg	YoY Change (#)	YoY Change (%)
2025	253	254	▲ +5	▲ +2.0%
2024	245	249	▼ -12	▼ -4.6%
2023	247	261	▼ -9	▼ -3.3%
2022	257	270	▲ +5	▲ +1.9%
2021	249	265	▲ +15	▲ +6.0%
2020	235	250	▲ +4	▲ +1.6%
2019	242	246	▲ +12	▲ +5.1%
2018	238	234	▼ -8	▼ -3.3%
2017	246	242	▲ +12	▲ +5.2%
2016	241	230	▲ +25	▲ +12.2%
2015	220	205	—	—

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Source: National Center for Education Statistics (NCES) Private School Universe Survey (PSS), direct school submissions, and proprietary website research and analysis by Private School Review.

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Show school map — California (students range: 1,428–6,206, avg 256)

School Size Range: 1,227 6,206 Avg. School Size: 1,671

Frequently Asked Questions

What is the California average private high schools student size?

The California average private high schools student size is 255 for 2026-27.

What are the private high schools with the largest student size in California?

The top ranked private high schools in California include Mother Of Divine Grace School, Laurel Springs School and School Of Science Technology Engineering And Math.

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