- Enrollment
- 411
- Students per teacher
- 14.2:1
- Resource Index
- 29/100
Middle school (grades 6-8) · Aledo, IL
Mercer County Jr High School
Federal NCES profile for Mercer County Jr High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 42/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 170139506040
👥 S:T ratio 53
🌟 Gifted program 30
🎓 Counselors 46
📋 Attendance 37
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Mercer County Jr High School earns 42/100 on the Resource Investment Index, with class sizes smaller than 75% of Illinois schools.
- #1 of 3
- public schools in Aledo · Resource Index
- 42
- Resource Index · Typical
- 11.7:1
- small classes for Illinois
- 270
- students enrolled
Mercer County Jr High School has class sizes smaller than 75% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Mercer County Jr High School ranks #1 of 3 public schools in Aledo, IL.
School address
District: Mercer County School District 404 · Illinois
NCES ID 170139506040 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-27 students YoY
Mercer County Jr High School shrank from 299 students in 2022-23 to 272 in 2023-24 (-9.0%).
Teacher FTE held 23.6 → 23.6 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Shrinking CCD campus
-27 students YoY 170139506040 · Aledo, IL Middle · SMALL · TRAD
270 enr · 11.7:1 · RII 42
Nearest enrollment peer: Mercer County High School (411 students)
Mercer County Jr High School shrank from 299 students in 2022-23 to 272 in 2023-24 (-9.0%). Teacher FTE held 23.6 → 23.6 across the same CCD years. Read with this school → · District book → · Illinois schools → · Find another →
Mercer County Jr High School in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Mercer County
Mercer County High School
411 students
- Apollo Elem Sc
Apollo Elem School
362 students
- This school
Mercer County Jr High School
270 students
- New Boston Ele
New Boston Elem School
165 students
- Mercer County 66
Mercer County Elc
66 students
What this shows Mercer County Jr High School reports 270 students on the CCD universe file.
How Mercer County Jr High School compares
Mercer County Jr High School is a shrinking campus on CCD: ratios and free-lunch share vs Illinois and U.S. means.
| Metric | This school | vs Illinois | Illinois avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 11.7:1 | ▼ 16% | 14:1 | 15.7:1 |
| Enrollment | 270 | top 70% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
11.7:1
Leaner classes than 78% of US schools, among the more generously staffed nationally.
270
Bigger than 28% of US schools by enrollment, mid-sized for the country.
Equity indicators methodology
Staffing depth
11.7:1
students per teacher
- 16% below state mean
Top 25% in Illinois - lower ratio than 75% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
25.2%
chronically absent (missed 10%+ of school days)
At or above 20%, the commonly used threshold for "high" chronic absenteeism, signaling significant barriers to regular attendance.
Funding equity
$15,828
per pupil, district-wide
- below Illinois avg of $18,196
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors1.0 FTE
Per 270 students, the combined health-and-guidance staffing load for this school.
Discipline context
19
in-school suspensions + 10 out-of-school
Suspension rate: 7.0 per 100 students. Combined in-school and out-of-school rate: 10.7 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
White 88.5%
Two or More 5.9%
African American 2.6%
Hispanic or Latino 1.9%
Asian 1.1%
Largest group: White at 88.5% of enrollment.
Student-body diversity index 21.2/100
Simpson diversity index - at 21.2, Mercer County Jr High School is less mixed than the Illinois school average of 38.9.
Programs
District finance for Mercer County School District 404 reports $15,828 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Mercer County Jr High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Mercer County High School | Larger | No free-lunch data | Higher S:T ratio |
| Apollo Elem School | Larger | No free-lunch data | Higher S:T ratio |
| New Boston Elem School | Smaller | No free-lunch data | Lower S:T ratio |
| Mercer County Elc | Smaller | No free-lunch data | Higher S:T ratio |
Comparisons are relative to Mercer County Jr High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 362
- Students per teacher
- 13.9:1
- Resource Index
- 34/100
- Enrollment
- 165
- Students per teacher
- 8.3:1
- Resource Index
- 32/100
- Enrollment
- 66
- Students per teacher
- 22:1
- Resource Index
- 12/100
Nationwide middle schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~270 students)
Frequently asked questions about Mercer County Jr High School
How many students attend Mercer County Jr High School?
Mercer County Jr High School has 270 students enrolled. It is a middle school in Aledo, IL. CCD year-over-year: 299 (2022-23) → 272 (2023-24), down 27.
What is the student-teacher ratio at Mercer County Jr High School?
The student-teacher ratio at Mercer County Jr High School is 11.7:1, which is 16% lower than the Illinois average of 14:1 and 25% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What is the racial and ethnic makeup of Mercer County Jr High School?
The largest demographic group at Mercer County Jr High School is White at 88.5% of enrollment, in Aledo, IL.
What is the Resource Investment Index for Mercer County Jr High School?
Mercer County Jr High School has a Resource Investment Index of 42/100 (typical reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, gifted-program reporting, counselor availability, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Mercer County Jr High School rank among public schools in Aledo?
By Resource Investment Index, Mercer County Jr High School ranks #1 of 3 public schools in Aledo, IL. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking.
What other schools are in Mercer County School District 404?
Besides Mercer County Jr High School, Mercer County School District 404 also operates Mercer County High School (411 students), Apollo Elem School (362 students), and New Boston Elem School (165 students). See the Mercer County School District 404 district page for the complete list.