allk12 · Rankings · Highest ratio · Illinois · St. Clair County · High schools

The public high schools with the highest student-to-teacher ratios in St. Clair County, Illinois

This ranking covers the public high schools with the highest student-to-teacher ratios in St. Clair County, Illinois, drawn from 11 qualifying public high schools. Cahokia High School leads the list at 18.6:1, against a median of 15.5:1 across the ranked schools.

Use the search box to find a specific school within this ranking, sort by any column, or export the full list. Built from NCES and state data for 2024-25.

Schools ranked

St. Clair County, Illinois

Top Students/teacher

18.6:1

Median Students/teacher

15.5:1

HIGHEST RATIO · ST. CLAIR COUNTY, ILLINOIS

#	School	City	District	Level	Students	Ratio
1	Cahokia High School	Cahokia, IL	Cahokia CUSD 187	High	850	18.6:1
2	Belleville High School-East	Belleville, IL	Belleville Twp HSD 201	High	2,600	16.9:1
3	O Fallon High School	O Fallon, IL	O Fallon Twp HSD 203	High	2,540	16.3:1
4	Belleville High School-West	Belleville, IL	Belleville Twp HSD 201	High	2,118	15.8:1
5	Mascoutah High School	Mascoutah, IL	Mascoutah CUD 19	High	1,243	15.6:1
6	East St Louis Senior High School	East Saint Louis, IL	East St Louis SD 189	High	1,288	15.5:1
7	Freeburg Community High Sch	Freeburg, IL	Freeburg CHSD 77	High	689	15.3:1
8	Collinsville High School	Collinsville, IL	Collinsville CUSD 10	High	1,956	14.9:1
9	Dupo High School	Dupo, IL	Comm Unit School District No 196	High	259	10.8:1
10	Marissa Jr & Sr High School	Marissa, IL	Marissa CUSD 40	High	226	9.8:1
11	Lebanon High School	Lebanon, IL	Lebanon CUSD 9	High	218	9.1:1

Page 1 of 1 · top 11 of 11 ranked. NCES + state assessment data, 2024-25.↓ Download full CSV

All schools in St. Clair County →

Highest ratio rankings at a wider scope

All Illinois Nationwide

Other rankings for St. Clair County, Illinois

Largest Most diverse Lowest ratio Highest proficiency Fastest growing Highest poverty Lowest poverty Lowest proficiency Most Hispanic Most Black Most White Most Asian

All ranking categories →

DATA NOTICE

allk12 is independent and not affiliated with, endorsed by, or sponsored by NCES, the US Census Bureau, any state education agency or assessment program, or any other government agency. Source data is compiled from public records and provided "as is," without warranty of accuracy or completeness. You rely on it, and any analysis derived from it, at your own risk. See the full disclaimer.