Total enrollment
1,274
+189 (+17%) vs SY 2020-21
5 schools in Mercer County School District 404
Illinois · 1,274 students · 3 cities
From elementary through high school, Mercer County School District 404 runs 5 public K-12 schools (3 elementary, 1 middle, and 1 high), with combined enrollment of about 1,274.
4-year change in Mercer County School District 404
SY 2020-21 vs SY 2024-25School count
5
+1 (+25%) vs SY 2020-21
Source: NCES Common Core of Data, enrollment-weighted demographic averages
How Mercer County School District 404 ranks
Among districts| Measure | This district | In Illinois | In the US |
|---|---|---|---|
| State test proficiency ranked highest first | 38.9% | #210 of 327 | N/A |
| Enrollment ranked largest first | 1,274 | #283 of 508 | #6,046 of 9,234 |
| Number of schools ranked most first | 5 | #167 of 508 | N/A |
| Students per teacher ranked fewest first | 11.8:1 | #100 of 506 | #1,823 of 9,044 |
| Free or reduced-price lunch share ranked highest first | 49.5% | #225 of 456 | #4,245 of 8,164 |
| Diversity index ranked most diverse first | 16.6% | #304 of 341 | #6,037 of 6,853 |
Districts need at least 2 schools and 500 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.
Inside Mercer County School District 404
State test results across the district's 4 scored schools run from New Boston Elementary School at 44.4% proficient to Mercer County Jr High School at 32.5%, a gap of 11.9 points. That is the 138th widest gap among 172 Illinois districts with four or more scored schools.
Since 2017-18, the 4 district schools that reported both years went from 1,132 to 1,208 students (up 7%) and from 81 to 105 full-time teachers (up 30%), as of 2024-25.
Proficient is the average share of students meeting the state standard across each school's state tests in 2023-24 and 2024-25; schools with fewer than 100 students and schools serving specialized populations are left out. Staffing figures come from the NCES Common Core of Data and count only schools that reported students and teachers in both years.
| Name | City | Level | Grades | Enrollment |
|---|---|---|---|---|
| Mercer County High School | Aledo | High | 09-12 | 411 |
| Apollo Elem School | Aledo | Elementary | KG-05 | 362 |
| Mercer County Jr High School | Aledo | Middle | 06-08 | 270 |
| New Boston Elem School | New Boston | Elementary | KG-05 | 165 |
| Mercer County ELC | Joy | Elementary | PK-PK | 66 |
About Mercer County School District 404
Mercer County School District 404 maintains 5 public schools across Illinois, collectively hosting roughly 1,274 students.
Looking at the level breakdown, Mercer County School District 404 is built around 3 elementary, 1 middle, and 1 high school.
On a per-school basis, Mercer County School District 404 runs about 255 students per school, 47% below the state mean of roughly 480.
Five-year track record. Combined enrollment now sits at 1,274 students, increased 17% from the 1,085 reported in SY 2020-21. The school count climbed from 4 to 5 across the same 4-year window.
On this page, the community for Mercer County School District 404 discusses sports rivalries, cross-district programs, and shared facilities. Members of the local community share what they see day-to-day.