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Harlem High School

9229 N Alpine Rd, Machesney Park, IL 61115

CSchola Grade
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Grades
9–12
High
Students
1,884
Enrolled 2024–25
Students per teacher
14.1 : 1
Full-time teachers
District
Harlem UD 122
Winnebago County

Schola Grade C · Average

Letter grade (A–F) · compared with 684 Illinois high schools · How we grade
Test scores21% proficient in math & reading
45thpercentile
Equity12% of low-income students proficient
51stpercentile
Attendance50% chronically absent
19thpercentile
Graduation rate80% graduate in 4 years
21stpercentile
College readinessAt least 21% take AP, IB or dual-enrollment courses
51stpercentile
Class size14.1 students per teacher
45thpercentile

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 Harlem High School

Harlem High School is a public high school in Machesney Park, Illinois, serving grades 9–12. It is part of Harlem UD 122. The school is located in a large suburb in Winnebago County.

In the 2024–25 school year, 1,884 students were enrolled, with about 14.1 students for every full-time teacher. That ratio is larger than 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

9229 N Alpine Rd
Machesney Park, IL 61115
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School details

Type
Public School · What this means
Level
High
Grades offered
9–12
Enrollment (2024–25)
1,884 students
Students per teacher
14.1 to 1
AP courses offered
31
Charter school
No
Magnet school
No
Locale
Suburb — Large
School district
Harlem UD 122
County
Winnebago County
NCES school ID
171824002100

Schools near Harlem High School

All 8 schools in Machesney Park →

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.