Total enrollment
3,909
+205 (+6%) vs SY 2020-21
Iroquois County
Illinois · Public K-12
Iroquois County, Illinois hosts 24 public K-12 schools and around 3,909 students, averaging roughly 163 per school. Central Cusd 4 runs the largest share. By grade band, the county runs 13 elementary, 5 middle, and 6 high schools.
4-year change in Iroquois County
SY 2020-21 vs SY 2024-25School count
23
+2 (+10%) vs SY 2020-21
Source: NCES Common Core of Data, enrollment-weighted demographic averages
How Iroquois County ranks
Among counties| Measure | This county | In Illinois | In the US |
|---|---|---|---|
| State test proficiency ranked highest first | 43.5% | #32 of 88 | N/A |
| Enrollment ranked largest first | 3,909 | #46 of 89 | #1,559 of 2,745 |
| Number of schools ranked most first | 23 | #25 of 89 | N/A |
| Students per teacher ranked fewest first | 11.5:1 | #7 of 89 | #392 of 2,655 |
| Free or reduced-price lunch share ranked highest first | 53.1% | #34 of 89 | #1,466 of 2,526 |
| Diversity index ranked most diverse first | 35.1% | #36 of 89 | #1,648 of 2,707 |
Counties need at least 3 schools and 1,000 students to be ranked. Test proficiency is ranked within the state only, since each state gives a different test. Each rank links to the full list.
Iroquois County school rankings
Residents
26,449
all ages · ACS 5-yr
Schools
24
8 districts
Enrollment
3,909
students · NCES CCD
Median income
$66,255
Below Illinois avg
Free/reduced lunch
53.1%
Above Illinois avg
Elementary
13
1,899 students
Middle
5
815 students
High
6
1,195 students
Combined / other
0
schools
LARGEST DISTRICT
Central CUSD 4
968 students · 8 districts in Iroquois County
County vs. school enrollment demographics
Left bar is the racial makeup of Iroquois 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".
County residents
School enrollment
Bachelor's+
18.2%
adults 25+
Poverty rate
8.4%
ACS 5-year
Unemployment
4.5%
civilian labor
Median age
44
21.6% under 18
Test scores in Iroquois County
Latest 2024-25 ELA proficiency, 13 schools ranked. Illinois state average: 51.0%.
Top 5 schools (ELA)
Lowest 5 schools (ELA)
- Milford Grade School West Campus· 34.8%
- Glenn Raymond School· 45.1%
- Crescent City Grade School· 50.0%
- John L Nash Middle School· 50.6%
- Chebanse Elem School· 55.0%
Cities in Iroquois County
About Iroquois County
Iroquois County is a small Illinois county of about 26,449 residents, home to 24 public schools and roughly 3,909 students.
Looking at the broader picture, census numbers show typical household earnings sit around $66,255, about 18% of adults have a bachelor's degree or above, and the poverty rate is around 8%. That income level is 6% meaningfully below the Illinois median.
Looking at the level breakdown, Iroquois County comprises 13 elementary schools (1,899 students), 5 middle schools (815), and 6 high schools (1,195).
The largest single district in Iroquois County is Central CUSD 4, which alone enrolls about 968 students.
Looking at the last 4 years. Combined enrollment now sits at 3,909 students, rose 6% from the 3,704 reported in SY 2020-21. Over that span, Iroquois County added 2 schools, going from 21 to 23.
In the discussion threads here, the community for Iroquois County discusses school events, board meetings, and seasonal calendars. Discussions cut across districts, schools, and grade levels.
Frequently asked questions
DATA · Census ACS 5-year · NCES Common Core of Data