Enrollment
270
Middle
DISTRICT 255 · STATE 462
SCHOOL COMMUNITY·MERCER COUNTY SCHOOL DISTRICT 404·NCES 170139506040
Mercer County Jr High School
1002 Sw 6Th St, Aledo, IL 61231 · (309) 584-4174 · Mercer County
GRADES 06–08MIDDLE42-RURALTITLE IREGULAR SCHOOL270 STUDENTS
C-
allk12 Grade
Scored higher than 15% of Illinois public middle schools
- CTest scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- DBeats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- ·Three-year trend Not available for this school, so the grade uses the other parts.
Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded Illinois public middle schools
Student : Teacher
11.3:1
24 FTE teachers
DISTRICT 13.4:1 · STATE 13.0:1
Free / Reduced Lunch
50%
134 students
DISTRICT 52% · STATE 56%
Community
0
0 members
Enrollment and student:teacher ratio compared against other middle schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Grade 6 | 95 | 35% |
| Grade 7 | 93 | 34% |
| Grade 8 | 82 | 30% |
Student demographics
21%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 17% · STATE 69% · US 70%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
School pathway
Students here typically continue to
Mercer County Jr High School→Mercer County High School
Based on grade levels within Mercer County School District 404. Attendance zones can vary; confirm enrollment with the district.
QUIET COMMUNITY
Be the first to start a discussion at Mercer County Jr High School.
START A DISCUSSIONTest scores
IAR + ISA 2024-25 . % Proficient (Levels 4-5)English Language Arts
35.3%
IL avg 51.0% . -1.2pp since 2023
Math
16.9%
IL avg 37.9% . +8.4pp since 2023
What this means: On the IAR + ISA, Illinois's statewide test, about 35 of every 100 students at this school read and write at grade level and about 17 of 100 do math at grade level. Across all Illinois schools, those numbers are about 51 and 38. Reading and writing scores are down about 1 points since 2023, while math scores are up about 8 points.
IAR + ISA results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 35.3% | 16.9% |
| 2023-24 | 36.5% | 8.5% |
% Proficient (Levels 4-5), all students and all tested grades.
Source: IAR + ISA. All students, all grades. See all years and grades →
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
32.5%
composite math + reading, all grades
Predicted
42.9%
based on IL schools with similar FRL share
Beats by
-10.4pp
below demographic expectation
What this means: About 32% of students here test proficient in math and reading, compared with the roughly 43% typical for Illinois schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among Illinois's top nor bottom 10%.
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →
Schools most like Mercer County Jr High School
Mercer County Jr High School's state test result (32.5% proficient) is higher than 0 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Mercer County Jr High School this school | 270 | 49.6% | 32.5% |
| Sullivan Middle School Sullivan | 266 | 47.4% | 45.0% |
| Edison Junior High School Pekin | 271 | 51.3% | 37.2% |
| Havana Jr High School Havana | 284 | 51.8% | 46.0% |
| Anna Junior High School Anna | 236 | 49.2% | 44.7% |
| Carlinville Middle School Carlinville | 286 | 46.5% | 51.9% |
Matched among Illinois middle schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.
Where Mercer County Jr High School ranks
Among middle schools| Measure | This school | In Illinois |
|---|---|---|
| State test proficiency ranked highest first | 32.5% | #409 of 578 |
| Math proficiency ranked highest first | 16.9% | #519 of 640 ▲ 42 |
| Reading proficiency ranked highest first | 35.3% | #536 of 640 ▼ 97 |
| Enrollment ranked largest first | 270 | #483 of 691 |
| Students per teacher ranked fewest first | 11.3:1 | #116 of 558 |
| Diversity index ranked most diverse first | 21.2% | #469 of 560 |
| Free and reduced lunch ranked highest share first | 49.6% | #299 of 581 |
Ranked against other public middle schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.
4-year change
SY 2020-21 vs SY 2024-25Enrollment
270
+58 (+27%) vs 2020
+25% since 2010-11, when it was 216
Source: NCES Common Core of Data
Enrollment and staffing by year
| School year | Students | Teachers (FTE) | Students per teacher | Free and reduced lunch |
|---|---|---|---|---|
| 2024-25 | 270 | 23.8 | 11.3:1 | 50% (134) |
| 2023-24 | 272 | 23.6 | 11.5:1 | 44% (119) |
| 2022-23 | 299 | 23.6 | 12.7:1 | 47% (141) |
| 2020-21 | 212 | N/A | N/A | N/A |
| 2017-18 | 194 | 15.3 | 12.7:1 | 42% (81) |
| 2015-16 | 196 | 13 | 15.1:1 | 51% (100) |
| 2010-11 | 216 | 15 | 14.4:1 | 42% (91) |
Source: NCES Common Core of Data. Rows are the federal collections on file for Mercer County Jr High School.
Since 2017-18: students up 39% (194 to 270); teachers up 55% (15.3 to 23.8).
About Mercer County Jr High School
This page covers Mercer County Jr High School, a small middle school in Aledo, Illinois. Total enrollment is 270 students, and the grades served are 6 through 8. That is 42% below the average of about 462 students for middle schools in Illinois.
Mercer County Jr High School sits within Mercer County School District 404, which has 5 schools and 1,274 students.
Mercer County Jr High School is 89% White by enrollment. Beyond that, enrollment is 6% multiracial and 3% Black. Measured by the diversity index, the student body scores 21%.
Mercer County Jr High School has 23.8 full-time-equivalent teachers, for a student-to-teacher ratio of about 11.3:1. By comparison, the average for middle schools in Illinois is 13.0:1. A common income measure, free or reduced-price lunch eligibility, is 50% at Mercer County Jr High School.
Mercer County Jr High School holds a C- allk12 Grade, placing it above 15% of Illinois public middle schools.
A school with Mercer County Jr High School's lunch-eligibility share in Illinois is predicted to score 42.9%. Mercer County Jr High School scores 32.5%, 10.4 points below that line.
In Mercer County, home to about 15,495 people, median household income comes to about $74,182, the share of adults with a bachelor's degree or higher is 21%, and about 7% of people live in poverty. Mercer County's 8 public schools enroll about 1,941 students and include Mercer County Jr High School.
Apollo Elementary School is about 0.1 miles from Mercer County Jr High School, the shortest distance to any other public school. Counting only straight-line distance, 2 other public schools are within five miles. On state test proficiency, Mercer County Jr High School ranks 8th in a group of 8 nearby schools.
The school's setting, by NCES definition, is Rural: Distant: in rural territory some distance from an urban area.
In 2024-25, the school enrolled 270, up from 212 in 2020-21.
The Mercer County Jr High School discussion page is a place for special education services, counseling, and support programs. Teachers and staff are welcome to share updates too.
Mercer County at a glance
View full county profilePopulation
15,495
Census ACS
Median income
$74,182
Household, ACS
Bachelor's+
21%
Adults 25+
Poverty rate
7%
Below federal line
Schools in county
8
1,941 students
Quick facts
Related schools
Other schools in Mercer County School District 404
- Mercer County High SchoolHigh · 411 students
- Apollo Elementary SchoolElementary · 362 students
- New Boston Elementary SchoolElementary · 165 students
- Mercer County ELCElementary · 66 students
Other schools in Aledo
- Mercer County High SchoolHigh · 411 students
- Apollo Elementary SchoolElementary · 362 students
Nearby schools
- Apollo Elementary School0.1 mi · 362
- Mercer County High School0.7 mi · 411
- Mercer County ELC6.2 mi · 66
- Matherville Intermediate School9.3 mi · 182
- Winola Elementary School9.4 mi · 261
- New Boston Elementary School12.2 mi · 165
Frequently asked questions
About Mercer County Jr High SchoolHow many students attend Mercer County Jr High School?
Mercer County Jr High School enrolls approximately 270 students in grades 06-08.
What grades does Mercer County Jr High School serve?
Mercer County Jr High School serves grades 06-08.
What is the student-teacher ratio at Mercer County Jr High School?
The student-to-teacher ratio at Mercer County Jr High School is approximately 11.3:1 (24 FTE teachers).
What is the racial breakdown of students at Mercer County Jr High School?
At Mercer County Jr High School, the student body is approximately 89% White, 2% Hispanic, 3% Black, 1% Asian, 6% Two or more.
Who oversees Mercer County Jr High School?
Mercer County Jr High School is overseen by Mercer County School District 404 in Mercer County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.