Enrollment
143
Illinois · 2024-25 NCES data
Elementary school (grades K-5) · Joliet, IL
Federal NCES profile for Union Elementary School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 55/100.
The verdict
Union Elementary School earns 55/100 on the Resource Investment Index, with class sizes smaller than 73% of Illinois schools. It is also more racially and ethnically mixed than most Illinois schools.
Union Elementary School has class sizes smaller than 73% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Union Elementary School ranks #2 of 20 elementary schools in Joliet, IL.
Enrollment
143
Illinois · 2024-25 NCES data
Teachers (FTE)
12.0
Federal CCD staff survey
Students per teacher
11.9:1
vs 14:1 Illinois avg
-15% vs state
How Union Elementary School compares with Illinois and U.S. medians
Union Elementary School is a small elementary school in Joliet, Illinois, enrolling 143 students.
Class sizes run a bit leaner than typical: 11.9:1 puts it in the smaller third of Illinois schools by student-teacher ratio.
Enrollment of 143 puts it in the smaller third of Illinois schools by headcount.
Its Resource Investment Index lands in the upper third of 3,845 scored Illinois schools.
Its student body is led by Hispanic or Latino (46%) and White (36%), more mixed than most schools in the state (diversity index 64/100).
Attendance holds up well here: only 7.0% of students were chronically absent, below the typical post-pandemic national figure.
The surrounding Union Sd 81 spends $40,623 per pupil, 138% above the Illinois average, a better-resourced district than most.
Among Joliet's elementary schools, it stands alongside Thomas Jefferson Elem Sch (646 students): Union Elementary School is smaller than that campus by headcount and runs leaner classes (11.9:1 vs 15.8:1).
Union Sd 81 operates only this one school, so Union Elementary School has no district-mates to compare against locally. At 143 students, it is also a small operation, on the smaller end of Illinois's single-school districts.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
Union Elementary 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 | 11.9:1 | ▼ 15% | 14:1 | 15.7:1 |
| Enrollment | 143 | top 90% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Largest group: Hispanic or Latino at 46.2% of enrollment.
Simpson diversity index - at 64.3, Union Elementary School is more mixed than the Illinois school average of 38.9.
District-wide per-pupil expenditure for Union Sd 81, which includes Union Elementary School.
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
6 comparable elementary schools (grades K-5) serving the same city.
Matched by enrollment size and by staffing ratio across all of Illinois, not just this city - a different peer set than the local comparisons above.
Next steps
Verify locally before acting on Union Elementary School's federal record.
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Union Elementary School has 143 students enrolled. It is an elementary school in Joliet, IL.
The student-teacher ratio at Union Elementary School is 11.9:1, which is 15% lower than the Illinois average of 14:1 and 24% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
The largest demographic group at Union Elementary School is Hispanic or Latino at 46.2% of enrollment, in Joliet, IL. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 64.3/100.
Union Elementary School has a Resource Investment Index of 55/100 (higher reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
By Resource Investment Index, Union Elementary School ranks #2 of 20 elementary schools in Joliet, IL. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in Joliet on the city page.
Union Elementary School earns 55/100 on the Resource Investment Index, with class sizes smaller than 73% of Illinois schools. It is also more racially and ethnically mixed than most Illinois schools. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
None reported; Union Sd 81 operates only Union Elementary School as a public school district in NCES's records.
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, or report a data error. Data current as of June 2026.