Cook County
Cook County in Illinois has 1,406 public K-12 schools in service today, collectively responsible for roughly 697,934 students with Chicago Public Schools Dist 299 the largest district. By grade band, the county runs 966 elementary, 151 middle, and 270 high schools.
7-year change in Cook County
SY 2017-18 vs SY 2024-25County vs. school enrollment demographics
Left bar is the racial makeup of Cook County residents (Census ACS 5-year). Right bar is the enrollment-weighted makeup of public schools in the county (NCES CCD). NCES systematically under-reports Hispanic, Pacific Islander, and Native American enrollment for many schools; where the resident share is meaningful but the reported school share is zero, we mark the school bar "not reported".
Test scores in Cook County
Latest 2024-25 ELA proficiency, 1,009 schools ranked. Illinois state average: 51.0%.
- Herzl Elem School· 6.8%
- Plato Learning Acad Elem School· 7.7%
- Kelvyn Park High School· 9.0%
- Dett Elem School· 10.3%
- Till Elem Math & Science Academy· 11.0%
Cities in Cook County
About Cook County
Cook County is a sizable county of about 5,182,090 residents in Illinois. Its public-school system educates approximately 697,934 students across 1406 schools.
Zooming out, census numbers show the median household earns about $83,498 a year, 43% of adults hold a bachelor's degree or higher, and the federal-poverty share is near 10%. That income level is 19% higher than the Illinois median.
Looking at the level breakdown, Cook County covers 966 elementary schools (387,587 students), 151 middle schools (80,599), 270 high schools (224,702), and 19 combined or other schools.
The largest single district in Cook County is Chicago Public Schools Dist 299, which alone enrolls about 324,396 students.
Trend over the past 7 years. Across the same 7-year window, public-school enrollment shrank 9%: 767,375 students in SY 2017-18 versus 696,942 in SY 2024-25. The school count fell from 1369 to 1268 across the same 7-year window.
On this page, the community for Cook County discusses enrollment trends, district policy changes, and bus-route updates. Members of the local community share what they see day-to-day.