allk12 · Rankings · Largest · Illinois · DeKalb County · High schools

The largest public high schools in DeKalb County, Illinois

8 public high schools in DeKalb County, Illinois appear in this ranking of the largest public high schools, ranked by total student enrollment, excluding online and virtual schools. DeKalb High School leads the list at 2,134, against a median of 377 across the ranked schools.

The table below is sortable and filterable, and the full list downloads as a CSV. Figures come from federal NCES enrollment data and, where applicable, state assessment results for 2024-25.

Schools ranked

DeKalb County, Illinois

Top Students

2,134

Median Students

377

LARGEST · DEKALB COUNTY, ILLINOIS

#	School	City	District	Level	Students
1	DeKalb High School	Dekalb, IL	DeKalb CUSD 428	High	2,134
2	Sycamore High School	Sycamore, IL	Sycamore CUSD 427	High	1,161
3	Sandwich Community High School	Sandwich, IL	Sandwich CUSD 430	High	560
4	Genoa-Kingston High School	Genoa, IL	Genoa Kingston CUSD 424	High	485
5	Indian Creek High School	Shabbona, IL	Indian Creek CUSD 425	High	268
6	Somonauk High School	Somonauk, IL	Somonauk CUSD 432	High	224
7	Hinckley-Big Rock High School	Hinckley, IL	Hinckley Big Rock CUSD 429	High	217
8	Hiawatha Jr/Sr High School	Kirkland, IL	Hiawatha CUSD 426	High	211

Page 1 of 1 · top 8 of 8 ranked. NCES + state assessment data, 2024-25.↓ Download full CSV

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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.