Residents
12,694,798
all ages · ACS 5-yr
4,471 schools in Illinois
103 counties · 868 cities · Public K-12
Illinois comprises 103 counties and 868 cities, collectively home to 4,471 public K-12 schools. Adlai E Stevenson High School is the largest single campus at 4,758 students.
Students
1,847,081
public K-12 · NCES
Schools
4,471
public K-12
Counties
103
868 cities
Test scores
Reading, SY 2024-25. State average: 51.0% met or exceeded.Top 5 schools
- 98.4%
- 98.0%
- 98.0%
- 97.5%
- 97.4%
Lowest 5 schools
- 2.1%
- 3.1%
- 3.4%
- 5.6%
- 6.8%
Counties
Cook County1,406 schools→DuPage County277 schools→Lake County214 schools→Will County209 schools→Kane County167 schools→St. Clair County96 schools→Winnebago County94 schools→McHenry County89 schools→Madison County84 schools→Peoria County81 schools→Sangamon County77 schools→Champaign County66 schools→McLean County60 schools→Rock Island County57 schools→Tazewell County56 schools→LaSalle County54 schools→Kendall County50 schools→Whiteside County50 schools→Kankakee County44 schools→DeKalb County43 schools→Macon County43 schools→Vermilion County41 schools→Jackson County32 schools→Woodford County32 schools→Jefferson County31 schools→Grundy County28 schools→Henry County28 schools→Macoupin County28 schools→Morgan County28 schools→Marion County27 schools→Knox County26 schools→Ogle County26 schools→Williamson County26 schools→Franklin County25 schools→Fulton County24 schools→Iroquois County24 schools→Livingston County24 schools→Adams County23 schools→Coles County23 schools→Stephenson County23 schools→Bureau County22 schools→Jo Daviess County21 schools→Christian County19 schools→Clinton County19 schools→Edgar County19 schools→Lee County19 schools→McDonough County19 schools→Montgomery County19 schools→Effingham County18 schools→Union County18 schools→Boone County17 schools→Randolph County16 schools→Fayette County15 schools→Hancock County15 schools→Logan County15 schools→Saline County15 schools→White County15 schools→Monroe County14 schools→Piatt County14 schools→Shelby County14 schools→Perry County12 schools→Pike County12 schools→Wayne County12 schools→Crawford County10 schools→Douglas County10 schools→Jersey County10 schools→Massac County10 schools→Warren County10 schools→Clark County9 schools→Ford County9 schools→Marshall County9 schools→Mason County9 schools→Bond County8 schools→Cass County8 schools→Clay County8 schools→Greene County8 schools→Mercer County8 schools→Alexander County7 schools→Carroll County7 schools→Cumberland County7 schools→De Witt County7 schools→Johnson County7 schools→Menard County7 schools→Washington County7 schools→Jasper County6 schools→Lawrence County6 schools→Moultrie County6 schools→Richland County6 schools→Pulaski County5 schools→Schuyler County5 schools→Scott County5 schools→Stark County5 schools→Wabash County5 schools→Calhoun County4 schools→Hamilton County4 schools→Henderson County4 schools→Putnam County4 schools→Brown County3 schools→Edwards County3 schools→Gallatin County3 schools→Hardin County3 schools→Pope County2 schools→Miami-Dade County1 schools→