High school (grades 9-12) · Machesney Park, IL

Harlem High School

Federal NCES profile for Harlem High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 43/100.

2024-25 NCES dataHigh school (grades 9-12)NCES 171824002100

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Compiled from official source data by PlainSchools. · Updated August 2026

The verdict

Harlem High School earns 43/100 on the Resource Investment Index, with class sizes near the Illinois median. It is also one of the largest schools in Illinois.

#2 of 6
public schools in Machesney Park · Resource Index: 43
Resource Index · Typical: 13.8:1
students per teacher: 1,884
students enrolled

Harlem High School has class sizes near the Illinois median. Computed live against every Illinois school reporting to NCES.

By Resource Investment Index, Harlem High School ranks #2 of 6 public schools in Machesney Park, IL.

School address

Machesney Park, IL 61115

District: Harlem Ud 122 · Illinois

NCES ID 171824002100 Verify on NCES CCD record →

NCES CCD universe card

School universe 171824002100 · Machesney Park, IL High · MID · TRAD

1,884 enr · 13.8:1 · RII 43

Nearest enrollment peer: Harlem Middle School (1,330 students)

Resource Investment Index #2 of 6 public schools in Machesney Park. NCES Common Core of Data stamps for this campus. Read with this school → · District book → · Illinois schools → · Find another →

This school

1,884
Harlem Middle

1,330
Donald C Parke

571
Machesney Elem

361
Windsor Elem S

315
Maple Elem Sch

313

What this shows Harlem High School reports 1,884 students on the CCD universe file.

How Harlem High School compares

Harlem High School on the metrics families compare, against Illinois and U.S. means.

Metric	This school	vs Illinois	Illinois avg	U.S. avg
Students per teacher	13.8:1	▼ 1%	14:1	15.7:1
Enrollment	1,884	top 3%	-	-

Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25

13.8:1

Leaner classes than 59% of US schools, a middle-of-the-pack class size.

1,884

Bigger than 98% of US schools by enrollment, a large campus nationally.

Equity indicators (what these measure)

Staffing depth

13.8:1

students per teacher - 1% below state mean

Top 53% in Illinois - lower ratio than 47% of state schools

Close to the 15:1 benchmark most often cited for individualized attention.

Funding equity

$21,101

per pupil, district-wide - above Illinois avg of $18,196

Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.

Support staff

Counselors8.0 FTE

Per 236 students, the combined health-and-guidance staffing load for this school.

Discipline context

308

in-school suspensions + 198 out-of-school

Suspension rate: 16.3 per 100 students. Combined in-school and out-of-school rate: 26.9 per 100 students. Reported via the Civil Rights Data Collection.

Student demographics

White 65.2%

Hispanic or Latino 16.7%

Two or More 8.6%

African American 7.9%

Asian 1.4%

American Indian / Alaska Native 0.3%

Largest group: White at 65.2% of enrollment.

Student-body diversity index 53.3/100

Simpson diversity index - at 53.3, Harlem High School is more mixed than the Illinois school average of 38.9.

Programs

AP courses offered 29

Funding & spending

District-wide per-pupil expenditure for Harlem Ud 122, which includes Harlem High School.

$21,101

Per student

+16%

vs Illinois

Avg $18,196

+19%

vs U.S.

Avg $17,658

Revenue mix

Local 41.1%

State 46.8%

Federal 12.1%

Source: NCES F-33 School District Finance Survey District-level finance · FY 2022-23 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.

How Harlem High School Compares to District-Mates

School	Enrollment	Economic Profile	Student-Teacher Ratio	Resources	Type
Harlem Middle School	Smaller	No free-lunch data	Higher S:T ratio	Lower resources	Traditional public
Donald C Parker Early Educ Center	Smaller	No free-lunch data	Higher S:T ratio	Lower resources	Traditional public
Machesney Elem School	Smaller	No free-lunch data	Similar S:T ratio	Similar resources	Traditional public
Windsor Elem School	Smaller	No free-lunch data	Lower S:T ratio	Lower resources	Traditional public
Maple Elem School	Smaller	No free-lunch data	Similar S:T ratio	Higher resources	Traditional public

Comparisons are relative to Harlem High School's own figures; each column derives from NCES Common Core of Data.

Other Schools in This District

Harlem Ud 122 · 5 sibling schools

View district profile

Harlem Middle School

Middle Standard

Enrollment: 1,330
Students per teacher: 16.8:1
Resource Index: 32/100

Compare side-by-side

Donald C Parker Early Educ Center

Other Standard

Enrollment: 571
Students per teacher: 16.8:1
Resource Index: 24/100

Compare side-by-side

Machesney Elem School

Elementary Standard

Enrollment: 361
Students per teacher: 13.9:1
Resource Index: 36/100

Compare side-by-side

Windsor Elem School

Elementary Standard

Enrollment: 315
Students per teacher: 11.7:1
Resource Index: 28/100

Compare side-by-side

Maple Elem School

Elementary Standard

Enrollment: 313
Students per teacher: 14.9:1
Resource Index: 57/100

Compare side-by-side

Nationwide high 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 (~1,884 students)

Similar student-teacher ratio (~13.8:1)

Frequently asked questions about Harlem High School

How many students attend Harlem High School?

Harlem High School has 1,884 students enrolled. It is a high school in Machesney Park, IL.

What is the student-teacher ratio at Harlem High School?

The student-teacher ratio at Harlem High School is 13.8:1, which is 1% lower than the Illinois average of 14:1 and 12% 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 Harlem High School?

The largest demographic group at Harlem High School is White at 65.2% of enrollment, in Machesney Park, IL. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 53.3/100.

What is the Resource Investment Index for Harlem High School?

Harlem High School has a Resource Investment Index of 43/100 (typical reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, gifted-program reporting, counselor availability. Not a test-score or academic measure (national median ~41/100, see methodology).

How does Harlem High School rank among public schools in Machesney Park?

By Resource Investment Index, Harlem High School ranks #2 of 6 public schools in Machesney Park, IL. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Machesney Park on the city page.

What other schools are in Harlem Ud 122?

Besides Harlem High School, Harlem Ud 122 also operates Harlem Middle School (1,330 students), Donald C Parker Early Educ Center (571 students), and Machesney Elem School (361 students). See the Harlem Ud 122 district page for the complete list.

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Compiled from official source data by PlainSchools. · Updated August 2026

Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error. Data current as of August 2026.