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EDITION 2026.08 /8,821 RECORDS / PUBLIC DOMAIN

PublicDataHubOfficial public data, made findable
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Public school / High

Mercer County High School

Aledo, Illinois

NCES ID
170139500018
District
Mercer County School District 404
School type
Regular
Title I
Not designated

Mercer County High School is a public high school in Aledo, Illinois, run by Mercer County School District 404. It enrols 404 students — the 50289th largest of 4,435 public schools in Illinois.

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Reported figures, 2022–2023

The Common Core of Data is a directory collection: it records size and staffing, not achievement. Nothing here says whether a school is good.

Enrollment

404students

50289th nationally, tied with 142

Teachers

29.0FTE

43988th nationally, tied with 2,243

Students per teacher

13.9students

36737th nationally, tied with 926

Free or reduced-price lunch

39.6%percent

60943rd nationally, tied with 100

How these figures are defined

Enrollment

Students reported in the autumn headcount. Size is not quality — it is here because it is the figure every other one has to be read against, and because a school of 90 and a school of 4,000 are not comparable on anything else.

Teachers

Classroom teachers in full-time equivalents, so a half-time teacher counts as 0.5. Non-teaching staff are excluded.

Students per teacher

Enrollment divided by teacher FTE. It is not class size: it counts every teacher against every student, including specialists who never take a full class. A school can have 15 students per teacher and 30 in the room.

Free or reduced-price lunch

Share of students eligible for free or reduced-price meals — the most widely used proxy for concentrated poverty in a school. Districts under community eligibility report all students as eligible, which inflates the figure and makes cross-district comparison unreliable.

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Within Mercer County School District 404

Schools in the same district, which is the comparison the data actually supports — a peer group defined by who runs them rather than by whichever names sort nearby.

Enrollment — same district
  1. 1Mercer County High School404 students
  2. 2Apollo Elem School335 students
  3. 3Mercer County Jr High School299 students
  4. 4New Boston Elem School175 students
  5. 5Mercer County Elc81 students
Distance from the state median

Baseline: Illinois median across 4,435 public schools. Bars right of the rule are above it.

  • Enrollment0.0%
  • Teachers+11.5%
  • Students per teacher+1.5%
  • Free or reduced-price lunch−25.8%
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Where this sits

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Sources & licence

Collected by the National Center for Education Statistics. Nothing here is edited, interpolated or estimated.

Provenance

National Center for Education Statistics
Common Core of Data — school and district directory
Current · as of August 17, 2026U.S. Public Domain (NCES)

Collected and published by NCES; retrieved through the Urban Institute Education Data Portal, which republishes the NCES files unchanged.

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Data as of September 1, 2022.