Mercer County High School

1500 S College Ave, Aledo, IL 61231

CSchola Grade
Grades
9–12
High
Students
411
Enrolled 2024–25
Students per teacher
13 : 1
Full-time teachers
District
Mercer County School District 404
Mercer County

Schola Grade C · Average

Letter grade (A–F) · compared with 684 Illinois high schools · How we grade
Test scores22% proficient in math & reading
49thpercentile
Equity30% of low-income students proficient
90thpercentile
Attendance43% chronically absent
25thpercentile
Graduation rate82% graduate in 4 years
26thpercentile
College readinessAt least 23% take AP, IB or dual-enrollment courses
55thpercentile
Class size13 students per teacher
58thpercentile

Percentiles compare this school with other Illinois high schools; the line marks the middle. Data: test scores 2021–22, graduation and absenteeism 2022–23 (U.S. Department of Education, EDFacts); coursework 2023–24 (Civil Rights Data Collection); staffing 2024–25 (NCES).

About Mercer County High School

Mercer County High School is a public high school in Aledo, Illinois, serving grades 9–12. It is part of Mercer County School District 404. The school is located in a rural area in Mercer County.

In the 2024–25 school year, 411 students were enrolled, with about 13 students for every full-time teacher. That ratio is close to the typical Illinois high school (13.3 students per teacher). Its Schola Grade is C (average), compared with 684 Illinois high schools.

Grades & enrollment

Students per grade, 2024–25Grades 9–12

Location & nearby schools

1500 S College Ave
Aledo, IL 61231
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School details

Type
Public School · What this means
Level
High
Grades offered
9–12
Enrollment (2024–25)
411 students
Students per teacher
13 to 1
AP courses offered
11
Charter school
No
Magnet school
No
Locale
Rural — Distant
School district
Mercer County School District 404
County
Mercer County
NCES school ID
170139500018

Schools near Mercer County High School

All 3 schools in Aledo →

School data comes from the U.S. Department of Education: the National Center for Education Statistics (NCES) Common Core of Data and EDGE school locations (2024–25) and Private School Survey (2023–24), the Civil Rights Data Collection (2023–24), and EDFacts (test results 2021–22; graduation and chronic absenteeism 2022–23), plus other public sources. Please contact the school to confirm enrollment, programs, and other details. How we source data.