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Schools›Illinois›Mason City
SCHOOL COMMUNITY·ILLINI CENTRAL CUSD 189·NCES 170011305577

Illini Central Middle School

208 N West Ave, Mason City, IL 62664 · (217) 482-5180 · Mason County
GRADES 06–08MIDDLE42-RURALTITLE IREGULAR SCHOOL139 STUDENTS
Enrollment
139
Middle
DISTRICT 160 · STATE 462
Student : Teacher
11.2:1
12 FTE teachers
DISTRICT 12.8:1 · STATE 13.0:1
Free / Reduced Lunch
45%
63 students
DISTRICT 47% · 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
Grade 6
42
Grade 7
49
Grade 8
48
Student demographics
White
13396%
DISTRICT 94% · STATE 45%
Hispanic
32%
DISTRICT 3% · STATE 29%
Two+
32%
DISTRICT 3% · STATE 5%
Student head counts by race/ethnicity from federal NCES enrollment data. Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
Male
8058%
Female
5942%

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Test scores

IAR + ISA 2024-25 . % Proficient (Levels 4-5)
English Language Arts
54.0%
IL avg 51.0% . +21.4pp since 2023
Math
27.3%
IL avg 37.9% . +6.0pp since 2023
Source: IAR + ISA. All students, all grades. See all years and grades →

BeatsExpectations

Demographically-adjusted score · methodology
Tier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
35.7%
composite math + reading, all grades
Predicted
45.3%
based on IL schools with similar FRL share
Beats by
-9.6pp
below demographic expectation
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →

7-year change

SY 2017-18 vs SY 2024-25
Enrollment
139
-19 (-12%) vs 2017
Student : Teacher
11.2:1
was 11.8:1
% White
96%
was 92%
% Hispanic
2%
was 4%
% Asian
0%
was 1%
Source: NCES Common Core of Data

About Illini Central Middle School

Set in Mason City, Illinois, Illini Central Middle School is a rural-scale middle school, one of the schools within Illini Central CUSD 189. It works with 139 students across grades 6 through 8. That puts it 70% below the typical public school in Illinois, which averages around 462 students.

Illini Central CUSD 189 comprises 4 schools with combined enrollment of 640 students; Illini Central Middle School is among them.

On demographics, Illini Central Middle School reports that nearly all students (96%) are White. Other groups include 2% Hispanic, 2% multiracial. That mix tracks the wider county fairly closely.

On the resource side, On paper, Illini Central Middle School has 12 full-time-equivalent teachers, translating to a class-load average of around 11.2:1. Statewide, the average ratio sits near 13.0:1, putting Illini Central Middle School tighter than the state norm the norm. About 45% of enrolled students meet the income threshold for free or reduced-price lunch, a commonly cited indicator of low-income enrollment.

With demographic context factored in, Illini Central Middle School tracks the demographic baseline. The model predicts 45.3% given the school's FRL share; actual proficiency is 35.7%.

Zooming out to the county, the surrounding county (Mason County) records that median household earnings sit near $62,845, 17% of adults hold a bachelor's degree or higher, and census figures put the poverty rate at about 11%. Illini Central Middle School is one of 9 public schools in Mason County (combined enrollment of about 2,124 students).

Nearest neighbor: Illini Central Grade School, around 0.0 miles off. Within five miles, there are 3 other public schools. On composite proficiency, Illini Central Middle School comes 3rd of 8 in the immediate cluster, beneath the nearby-schools average of 37.1%.

Geographically, the school is in a rural area.

Five-year trend. Looking back 7 years, enrollment at Illini Central Middle School has decreased 12%, going from 158 students in 2018 to 139 in 2025.

On allk12, the feed for Illini Central Middle School typically covers open house dates, ride-share offers, and field-trip permission slips. Anyone with firsthand experience at this school can post or comment.

Mason County at a glance

View full county profile
Population
12,745
Census ACS
Median income
$62,845
Household, ACS
Bachelor's+
17%
Adults 25+
Poverty rate
11%
Below federal line
Schools in county
9
2,124 students

Quick facts

School name
Illini Central Middle School
District
Illini Central CUSD 189
Address
208 N West Ave, Mason City, IL 62664
Phone
(217) 482-5180
County
Mason County
Level
Middle
Grade range
06–08
Total enrollment
139
Teachers (FTE)
12
Student–teacher ratio
11.2:1
Free/Reduced lunch
63 (45%)
Locale
42-Rural: Distant
NCES ID
170011305577
Charter school
No
Virtual school
No

Related schools

Other schools in Illini Central CUSD 189
Other schools in Mason City
Nearby schools

Frequently asked questions

About Illini Central Middle School
What is the total enrollment at Illini Central Middle School?
Illini Central Middle School enrolls approximately 139 students in grades 06-08.
What grades does Illini Central Middle School serve?
Illini Central Middle School serves grades 06-08.
How many teachers does Illini Central Middle School have?
Illini Central Middle School employs 12 FTE teachers, for a student-to-teacher ratio of 11.2:1.
What is the racial breakdown of students at Illini Central Middle School?
At Illini Central Middle School, the student body is approximately 96% White, 2% Hispanic, 2% Two or more.
Is Illini Central Middle School public or private?
Illini Central Middle School is a public K-12 school, overseen by Illini Central CUSD 189.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.
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