Enrollment
676
Illinois · 2024-25 NCES data
Elementary school (grades K-5) · Oswego, IL
Southbury Elem School
Federal NCES profile for Southbury Elem School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 62/100.
2024-25 NCES dataElementary school (grades K-5)NCES 173027006004
👥 S:T ratio 36
🌟 Gifted program 70
📋 Attendance 80
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Southbury Elem School earns 62/100 on the Resource Investment Index, with class sizes larger than 80% of Illinois schools. It is also more racially and ethnically mixed than most Illinois schools.
- #3 of 6
- elementary schools in Oswego · Resource Index
- 62
- Resource Index · Higher
- 16.1:1
- large classes for Illinois
- 676
- students enrolled
Southbury Elem School has class sizes larger than 80% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Southbury Elem School ranks #3 of 6 elementary schools in Oswego, IL.
School address
Teachers (FTE)
42.0
Federal CCD staff survey
Students per teacher
16.1:1
vs 14:1 Illinois avg
+15% vs state
Student-teacher ratio in context
How Southbury Elem School compares with Illinois and U.S. medians
What stands out at Southbury Elem School
Southbury Elem School is a large elementary school in Oswego, Illinois, enrolling 676 students.
Class loads run somewhat heavier than typical: 16.1:1 puts it in the larger third of Illinois schools by student-teacher ratio.
Enrollment of 676 puts it in the larger third of Illinois schools by headcount.
Its Resource Investment Index outscores 96% of the 3,845 Illinois schools with a score on record, a top-tier result on this measure.
Its student body is led by White (53%) and Hispanic or Latino (16%), more mixed than most schools in the state (diversity index 66/100).
Attendance holds up well here: only 8.1% of students were chronically absent, below the typical post-pandemic national figure.
Among Oswego's elementary schools, it stands alongside Fox Chase Elementary School (661 students): Southbury Elem School is larger than that campus by headcount and runs leaner classes (16.1:1 vs 16.1:1).
Cusd 308 also operates Oswego High School (2,870 students) and Oswego East High School (2,758 students) alongside Southbury Elem School.
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
How Southbury Elem School compares
Southbury Elem 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 | 16.1:1 | ▲ 15% | 14:1 | 15.7:1 |
| Enrollment | 676 | top 15% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
16.1:1
Leaner classes than 37% of US schools, a middle-of-the-pack class size.
676
Bigger than 79% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Staffing depth
16.1:1
students per teacher
- 15% above state mean
Top 80% in Illinois - lower ratio than 20% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
8.1%
chronically absent (missed 10%+ of school days)
In the 5-10% range, close to the pre-pandemic national baseline.
Funding equity
$16,181
per pupil, district-wide
- below Illinois avg of $17,042
Close to the U.S. public-school average per-pupil spend.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
4
in-school suspensions + 1 out-of-school
Suspension rate: 0.6 per 100 students. Combined in-school and out-of-school rate: 0.7 per 100 students. Reported via the Civil Rights Data Collection.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
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.
Student demographics
White 52.8%
Hispanic or Latino 16.4%
Asian 13.8%
African American 11.1%
Two or More 5.6%
American Indian / Alaska Native 0.1%
Native Hawaiian / Pacific Islander 0.1%
Largest group: White at 52.8% of enrollment.
Student-body diversity index 66.0/100
Simpson diversity index - at 66.0, Southbury Elem School is more mixed than the Illinois school average of 38.9.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Cusd 308, which includes Southbury Elem School.
$16,181
Per student
-5%
vs Illinois
Avg $17,042
-2%
vs U.S.
Avg $16,593
Revenue mix
Local 47.8%
State 45.6%
Federal 6.5%
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.
How Southbury Elem School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Oswego High School | Larger | No free-lunch data | Similar S:T ratio |
| Oswego East High School | Larger | No free-lunch data | Similar S:T ratio |
| Traughber Jr High School | Larger | No free-lunch data | Similar S:T ratio |
| Thompson Jr High School | Similar size | No free-lunch data | Similar S:T ratio |
| Lakewood Creek Elementary | Similar size | No free-lunch data | Higher S:T ratio |
Comparisons are relative to Southbury Elem School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,870
- Students per teacher
- 16.1:1
- Resource Index
- 47/100
- Enrollment
- 2,758
- Students per teacher
- 16.2:1
- Resource Index
- 44/100
- Enrollment
- 1,070
- Students per teacher
- 17.5:1
- Resource Index
- 51/100
- Enrollment
- 832
- Students per teacher
- 15.7:1
- Resource Index
- 42/100
- Enrollment
- 767
- Students per teacher
- 20.2:1
- Resource Index
- 52/100
Similar elementary schools in Oswego
5 comparable elementary schools (grades K-5) serving the same city.
Fox Chase Elementary School
Standard public school
661 students 16.1:1 students per teacher
Prairie Point Elem School
Standard public school
455 students 15.7:1 students per teacher
Churchill Elem School
Standard public school
425 students 13.3:1 students per teacher
Old Post Elementary School
Standard public school
387 students 12.1:1 students per teacher
Hunt Club Elem
Standard public school
357 students 8.7:1 students per teacher
Similar elementary schools statewide
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.
Similar enrollment (~676 students)
Similar student-teacher ratio (~16.1:1)
Next steps
Verify locally before acting on Southbury Elem School's federal record.
- Compare Southbury Elem School against another school. Compare schools
- Cusd 308's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
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.
Frequently asked questions about Southbury Elem School
How many students attend Southbury Elem School?
Southbury Elem School has 676 students enrolled. It is an elementary school in Oswego, IL.
What is the student-teacher ratio at Southbury Elem School?
The student-teacher ratio at Southbury Elem School is 16.1:1, which is 15% higher than the Illinois average of 14:1 and 3% higher than the national average of 15.7:1.
What is the racial and ethnic makeup of Southbury Elem School?
The largest demographic group at Southbury Elem School is White at 52.8% of enrollment, in Oswego, IL. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 66.0/100.
What is the Resource Investment Index for Southbury Elem School?
Southbury Elem School has a Resource Investment Index of 62/100 (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).
How does Southbury Elem School rank among elementary schools in Oswego?
By Resource Investment Index, Southbury Elem School ranks #3 of 6 elementary schools in Oswego, 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 Oswego on the city page.
Is Southbury Elem School a good school?
Southbury Elem School earns 62/100 on the Resource Investment Index, with class sizes larger than 80% 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.
What other schools are in Cusd 308?
Besides Southbury Elem School, Cusd 308 also operates Oswego High School (2,870 students), Oswego East High School (2,758 students), and Traughber Jr High School (1,070 students). See the Cusd 308 district page for the complete list.
Related tools
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.