Illinois · NCES CCD 2022-23

Largest Schools in Illinois

The 50 largest public schools in Illinois, ranked by total student enrollment from NCES CCD 2022-23.

4,758
Largest school
3,020
Avg across top 50
50
Schools listed

The ranking in one line

Adlai E Stevenson High School in Lincolnshire is Illinois's largest public school with 4,758 students enrolled.

4,758
students at Adlai E Stevenson High School
17.8:1
student-teacher ratio at the largest school
3,020
average across the top 50
# School Enrollment
1 Adlai E Stevenson High School Lincolnshire 4,758
2 Lane Technical High School Chicago 4,604
3 Taft High School Chicago 4,487
4 Waukegan High School Waukegan 4,186
5 East High School Aurora 4,020
6 Lyons Twp High Sch La Grange 3,706
7 Lockport Township High Sch East Lockport 3,678
8 West Aurora High School Aurora 3,641
9 Evanston Twp High School Evanston 3,560
10 Warren Township High School Gurnee 3,537
11 Joliet West High School Joliet 3,451
12 J Sterling Morton East High Sch Cicero 3,394
13 J Sterling Morton West High Sch Berwyn 3,374
14 Oak Park & River Forest High Sch Oak Park 3,307
15 Bolingbrook High School Bolingbrook 3,298
16 Joliet Central High School Joliet 3,295
17 Curie Metropolitan High School Chicago 3,099
18 Neuqua Valley High School Naperville 3,018
19 Glenbrook South High School Glenview 2,923
20 Minooka Community High School Minooka 2,918
21 Oswego High School Oswego 2,870
22 Waubonsie Valley High School Aurora 2,849
23 Carl Sandburg High School Orland Park 2,840
24 Huntley High School Huntley 2,804
25 New Trier Township H S Winnetka Winnetka 2,770
26 Metea Valley High School Aurora 2,766
27 Oswego East High School Oswego 2,758
28 Barrington High School Barrington 2,718
29 Homewood-Flossmoor High School Flossmoor 2,707
30 Lincoln-Way East High School Frankfort 2,696
31 Wm Fremd High School Palatine 2,689
32 South Elgin High School South Elgin 2,665
33 Niles West High School Skokie 2,646
34 J B Conant High School Hoffman Estates 2,633
35 Belleville High School-East Belleville 2,600
36 Comm H S Dist 99 - South High Sch Downers Grove 2,591
37 York Comm High School Elmhurst 2,590
38 Naperville Central High School Naperville 2,589
39 Elgin High School Elgin 2,576
40 Dundee-Crown High School Carpentersville 2,573
41 Amos Alonzo Stagg High School Palos Hills 2,560
42 O Fallon High School O Fallon 2,540
43 Palatine High School Palatine 2,535
44 Lake Park High School Roselle 2,522
45 Maine South High School Park Ridge 2,494
46 Naperville North High School Naperville 2,467
47 Hinsdale Central High School Hinsdale 2,445
48 Rich Township High School Olympia Fields 2,433
49 Schaumburg High School Schaumburg 2,416
50 Plainfield North High School Plainfield 2,399

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Methodology

Enrollment data comes from the NCES Common Core of Data (CCD) 2022-23 school year. Schools are ranked by total student enrollment. Student-teacher ratios are calculated from full-time equivalent (FTE) teacher counts reported by each school.

Read our methodology — how this data is sourced, computed, and verified.