Enrollment
362
Missouri · 2024-25 NCES data
Elementary school (grades K-5) · O'fallon, MO
Ostmann Elem.
Federal NCES profile for Ostmann Elem., including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 57/100.
2024-25 NCES dataElementary school (grades K-5)NCES 290837002843
👥 S:T ratio 53
🌟 Gifted program 70
🎓 Counselors 28
📋 Attendance 77
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Ostmann Elem. earns 57/100 on the Resource Investment Index, with class sizes near the Missouri median.
- #1 of 12
- elementary schools in O'fallon · Resource Index
- 57
- Resource Index · Higher
- 11.7:1
- students per teacher
- 5.4%
- free-lunch eligible
Ostmann Elem. has class sizes near the Missouri median. Computed live against every Missouri school reporting to NCES.
By Resource Investment Index, Ostmann Elem. ranks #1 of 12 elementary schools in O'fallon, MO.
School address
District: Ft. Zumwalt R-Ii · Missouri
NCES ID 290837002843 Verify on NCES CCD record →
Teachers (FTE)
31.0
Federal CCD staff survey
Students per teacher
11.7:1
vs 12.8:1 Missouri avg
-9% vs state
Free-lunch eligible
5.4%
vs 46.1% Missouri avg
-88% vs state
Student-teacher ratio in context
How Ostmann Elem. compares with Missouri and U.S. medians
What stands out at Ostmann Elem.
Ostmann Elem. is a lower-poverty, mid-sized elementary school in O'fallon, Missouri, enrolling 362 students.
Class sizes run a bit leaner than typical: 11.7:1 puts it in the smaller third of Missouri schools by student-teacher ratio.
Comparatively few students face economic hardship here, 5.4% free-meal eligibility runs 88% below the Missouri average.
With 362 students, its enrollment sits close to the Missouri median campus size.
Its Resource Investment Index lands in the upper third of 2,313 scored Missouri schools.
Against 150 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #36.
Its student body is predominantly White (80% of enrollment) (diversity index 35/100).
Counselor availability sits well past the ASCA benchmark, roughly 362 students sharing each counselor, though short of the most stretched campuses.
Attendance holds up well here: only 9.4% of students were chronically absent, below the typical post-pandemic national figure.
Ft. Zumwalt R-Ii also operates Ft. Zumwalt West High (1,643 students) and Ft. Zumwalt North High (1,538 students) alongside Ostmann Elem..
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 Ostmann Elem. compares
Ostmann Elem. on the metrics families compare, against Missouri and U.S. means.
| Metric | This school | vs Missouri | Missouri avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 11.7:1 | ▼ 9% | 12.8:1 | 15.7:1 |
| Free-lunch eligible | 5.4% | ▼ 88% | 46.1% | 51.7% |
| Enrollment | 362 | top 41% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
11.7:1
Leaner classes than 78% of US schools, among the more generously staffed nationally.
362
Bigger than 42% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
5.4%
free-lunch eligible
- 88% below the Missouri average of 46.1%
Below the 40% Title I threshold, among the lower-need profiles in the state; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
11.7:1
students per teacher
- 9% below state mean
Top 37% in Missouri - lower ratio than 63% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
9.4%
chronically absent (missed 10%+ of school days)
In the 5-10% range, close to the pre-pandemic national baseline.
Funding equity
$12,920
per pupil, district-wide
- below Missouri avg of $12,931
Well below the U.S. average per-pupil spend, a notably leaner funding position that may affect programs, facilities, and staffing.
Support staff
Counselors1.0 FTE
Per 362 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 0 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.0 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 80.1%
Asian 8.3%
African American 3.9%
Hispanic or Latino 3.6%
Two or More 3.3%
American Indian / Alaska Native 0.6%
Native Hawaiian / Pacific Islander 0.3%
Largest group: White at 80.1% of enrollment.
Student-body diversity index 34.8/100
Simpson diversity index - at 34.8, Ostmann Elem. is more mixed than the Missouri school average of 31.0.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Ft. Zumwalt R-Ii, which includes Ostmann Elem..
$12,920
Per student
0%
vs Missouri
Avg $12,931
-22%
vs U.S.
Avg $16,593
Revenue mix
Local 65.1%
State 26.3%
Federal 8.6%
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 Ostmann Elem. Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Ft. Zumwalt West High | Larger | Similar economic need | Higher S:T ratio |
| Ft. Zumwalt North High | Larger | Similar economic need | Higher S:T ratio |
| Ft. Zumwalt South High | Larger | Similar economic need | Similar S:T ratio |
| Ft. Zumwalt East High | Larger | Higher economic need | Higher S:T ratio |
| Ft. Zuwmalt West Middle | Larger | Higher economic need | Similar S:T ratio |
Comparisons are relative to Ostmann Elem.'s own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,643
- Students per teacher
- 13.6:1
- Resource Index
- 41/100
- Enrollment
- 1,538
- Students per teacher
- 14.1:1
- Resource Index
- 35/100
- Enrollment
- 1,212
- Students per teacher
- 12.9:1
- Resource Index
- 42/100
- Enrollment
- 1,171
- Students per teacher
- 13.2:1
- Resource Index
- 38/100
- Enrollment
- 1,114
- Students per teacher
- 12:1
- Resource Index
- 52/100
Similar elementary schools statewide
Matched by enrollment size and by staffing ratio across all of Missouri, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~362 students)
Similar student-teacher ratio (~11.7:1)
Next steps
Verify locally before acting on Ostmann Elem.'s federal record.
- Compare Ostmann Elem. against another school. Compare schools
- Ft. Zumwalt R-Ii'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 Ostmann Elem.
How many students attend Ostmann Elem.?
Ostmann Elem. has 362 students enrolled. It is an elementary school in O'fallon, MO.
What is the student-teacher ratio at Ostmann Elem.?
The student-teacher ratio at Ostmann Elem. is 11.7:1, which is 9% lower than the Missouri average of 12.8:1 and 25% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at Ostmann Elem.?
5.4% of students at Ostmann Elem. are eligible for free lunch, compared to the Missouri average of 46.1%.
What is the racial and ethnic makeup of Ostmann Elem.?
The largest demographic group at Ostmann Elem. is White at 80.1% of enrollment, in O'fallon, MO.
What is the Resource Investment Index for Ostmann Elem.?
Ostmann Elem. has a Resource Investment Index of 57/100 (higher reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Ostmann Elem. rank among elementary schools in O'fallon?
By Resource Investment Index, Ostmann Elem. ranks #1 of 12 elementary schools in O'fallon, MO. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in O'fallon on the city page.
Is Ostmann Elem. a good school?
Ostmann Elem. earns 57/100 on the Resource Investment Index, with class sizes near the Missouri median. 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 Ft. Zumwalt R-Ii?
Besides Ostmann Elem., Ft. Zumwalt R-Ii also operates Ft. Zumwalt West High (1,643 students), Ft. Zumwalt North High (1,538 students), and Ft. Zumwalt South High (1,212 students). See the Ft. Zumwalt R-Ii 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.