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Largest Illinois 草榴社区 Schools

The average private school in Illinois has 167 students (2026-27).

The largest private school in Illinois is American School, with 6,319 students.

Quick Facts (2026-27)

# IL Schools Ranked: 1,507
Top 20 Range (Students): 817鈥�6,319
IL School Avg.: 167
National School Avg.: 175

Quick Facts (2026-27)

# IL Schools Ranked: 1,507
Top 20 Range (Students): 817鈥�6,319
IL School Avg.: 167
National School Avg.: 175

Illinois Average Students Per School (Trends)

View Data

Year	Illinois (IL) avg
2025	166
2024	162
2023	171
2022	178
2021	174
2020	168
2019	174
2018	171
2017	177
2016	175
2015	168

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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 鈥� Illinois (students range: 817鈥�6,319, avg 167)

School Size Range: 713 6,319 Avg. School Size: 1,142

Frequently Asked Questions

What is the Illinois average private schools student size?

The Illinois average private schools student size is 167 for 2026-27.

What are the private schools with the largest student size in Illinois?

The top ranked private schools in Illinois include American School, University of Chicago Laboratory Schools and Loyola Academy.

What is private high school and private elementary school with the largest student size in Illinois?

The private high school with the largest student size in Illinois is American School, with a value of 6319. The private elementary school with the largest student size is American School, with a value of 6319.

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