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. District totals are aggregated directly from the schools reporting under this district in the source records. See our
editorial standards & corrections policy, the
methodology behind these numbers, or
report a data error. Data current as of June 2026.
Mason City, Illinois - 4 schools
An equity score of 40/100 ranks Illini Central Cusd 189 #349 of 763 districts in Illinois (state average 38). Derived live from how evenly resources are distributed across the district's schools.
At $15,441 per pupil, Illini Central Cusd 189 ranks #461 of 848 Illinois districts by per-pupil spending (Illinois districts). NCES F-33 finance data.
649
Total Enrollment
4
Schools
$15,441
Per-Pupil Spending
Elementary, High
School Types
District-Level NCES Analysis
Illini Central Cusd 189 operates 4 public schools serving 649 students, placing it among the smallest districts in Illinois. The school portfolio breaks down into 1 elementary, 1 high, 1 middle, 1 combined schools, a small enough portfolio that most families will interact with nearly every campus in the district at some point. These enrollment and school figures come from the NCES Common Core of Data (CCD) 2024-25 release, and the district is based in Mason County.
Per-pupil expenditure runs $15,441 according to the NCES F-33 School District Finance Survey, in the lower half of 848 Illinois districts by per-pupil spending. See how Illinois compares in our national per-pupil spending analysis. The funding mix is 52.4% local, 36.2% state, and 11.5% federal, a local-revenue-heavy mix that leaves the district more exposed to property-tax swings and local ballot measures than state-funded peers. The district's equity score is 40/100, ranked #349 of 763 in Illinois against a state average of 38, in line with the typical spread seen across the state for how evenly funding reaches its schools.
Academic infrastructure includes 1 of 4 schools offering Advanced Placement (1 AP courses district-wide), a 160:1 student-counselor ratio, that meets the ASCA-recommended benchmark, and 33.2% chronic absenteeism from the 2021-22 Civil Rights Data Collection. Demographically, the student body averages 94.3% White, 2.6% Hispanic or Latino, 0.1% Asian across the district's schools. Its most demographically mixed campus is West Campus Facility, with a diversity index of 14.5/100.
Its largest campus is Illini Central Grade School, enrolling 264 students (41% of the district's total enrollment). Its smallest is West Campus Facility, at 65 students, a 4x enrollment spread across the district's campuses.
Illini Central Grade School accounts for 40.7% of all Illini Central Cusd 189 student enrollment
That dominant concentration means Illini Central Cusd 189-wide averages can mask substantial variation outside the dominant entity. Grade band: elementary. A single dominant campus often anchors a district's program offerings and staffing patterns; the share helps explain why district-wide averages may not reflect the typical neighbourhood-school experience. When one entity dominates a region's footprint, its programmatic and budget decisions effectively set policy for a majority of the affected population.
Illini Central Cusd 189 school enrollment varies 4.1× across entities
Illini Central Cusd 189 school enrollment ranges from 65 students (lowest) to 264 students (highest), a spread of 199 students. That relatively narrow ratio reflects an unusually homogeneous campus portfolio, most districts have a wider mix of school sizes. Per-school staffing ratios, programme availability, and capital-renovation cycles often diverge inside the same district based on enrollment shape.
Illini Central Cusd 189 student-counselor ratio is 160:1 — well below typical (typically associated with unusually small scale or exceptionally high per-unit investment)
student-counselor ratio is the simplest comparative metric but it does not capture the full picture: the ratio counts FTE counselors against total enrollment, districts that contract intervention or social-emotional staff outside the counselor classification may be under-counted Values this far below typical often correlate with unusually small scale or population characteristics rather than higher resource budgets per se — worth checking whether the underlying denominator is itself an outlier.
Illini Central Cusd 189 chronic absenteeism rate is 33.2% — high (typically associated with higher-than-average disruption; recent CRDC data showed elevated rates persisting after pandemic-era schooling changes)
chronic absenteeism rate is the simplest comparative metric but it does not capture the full picture: a student is chronically absent if they miss ≥10% of enrolled days for any reason, illness, family obligations, or disengagement Higher values may reflect larger urban scale or recent resource constraints that have widened the gap.