Enrollment
362
Elementary
DISTRICT 430 · STATE 315
SCHOOL COMMUNITY·FORT ZUMWALT SCHOOL DISTRICT·NCES 290837002843
OSTMANN ELEM.
200 MERIWETHER LEWIS DR, O'FALLON, MO 63368 · (636) 281-3382 · St. Charles County
GRADES KG–05ELEMENTARY21-SUBURBREGULAR SCHOOL362 STUDENTS
Student : Teacher
12.2:1
30 FTE teachers
DISTRICT 12.2:1 · STATE 12.4:1
Free / Reduced Lunch
9%
31 students
DISTRICT 20% · STATE 54%
Community
0
0 members
Enrollment and student:teacher ratio compared against other elementary schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade
Student demographics
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
Test scores
MO DVT (Growth) 2024-25 . Growth Percentile vs PeersEnglish Language Arts
54.0%
MO avg 49.5% . -1.9pp since 2023
Math
57.1%
MO avg 48.7% . +1.9pp since 2023
What this means: On the MO DVT (Growth), Missouri's statewide test, about 54 of every 100 students at this school read and write at grade level and about 57 of 100 do math at grade level. Across all Missouri schools, those numbers are about 50 and 49. Reading and writing scores are down about 2 points since 2023, while math scores are up about 2 points.
Source: MO DVT (Growth). All students, all grades. See all years and grades →
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
50.5%
composite math + reading, all grades
Predicted
51.1%
based on MO schools with similar FRL share
Beats by
-0.7pp
below demographic expectation
What this means: About 50% of students here test proficient in math and reading, compared with the roughly 51% typical for Missouri schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among Missouri's top nor bottom 10%.
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 2024-25Enrollment
362
+3 (+1%) vs 2017
Student : Teacher
12.2:1
was 11.5:1
% White
80%
was 85%
% Hispanic
4%
was 4%
% Black
4%
was 3%
% Asian
8%
was 6%
Source: NCES Common Core of Data
About OSTMANN ELEM.
OSTMANN ELEM. operates as a reasonably sized K-5 school in O'FALLON, Missouri, overseen by FORT ZUMWALT SCHOOL DISTRICT. Current enrollment sits at 362 students spanning grades K through 5.
OSTMANN ELEM. is one of 25 schools operated by FORT ZUMWALT SCHOOL DISTRICT, a district that teaches 16,698 students overall.
On demographics, OSTMANN ELEM. shows that nearly all students (80%) are White. Other groups include 8% Asian, 4% Black, 4% Hispanic, 3% multiracial. That mix tracks the wider county fairly closely.
Looking at school resources, Staff filings list 30 full-time-equivalent teachers, which works out to roughly 12.2:1 students per teacher. The state averages about 12.4:1, putting this campus right in line with peers. Roughly 9% of students at OSTMANN ELEM. qualify for free or reduced-price lunch, often used as a Title I proxy. By comparison, St. Charles County runs at roughly 19%, so the school's eligibility rate is meaningfully below the surrounding baseline.
On a residual basis (actual vs predicted given the student mix), OSTMANN ELEM. sits in the middle band of the BeatsExpectations distribution. Schools with this campus's student mix typically land near 51.1%; this one delivers 50.5%.
Around the school, community-level numbers for St. Charles County indicate median household earnings sit near $104,692, 43% of adults hold a bachelor's degree or higher, and the poverty rate sits near 4%. Across St. Charles County's 93 public schools (combined enrollment of about 59,314 students), OSTMANN ELEM. is one campus in the mix.
The closest other public school is TWIN CHIMNEYS ELEM., roughly 0.6 miles away. 8 of the 8 nearest public schools sit inside a five-mile radius. Ranking that nearby cluster on reported proficiency puts OSTMANN ELEM. at 6th of 9; the average score across the group is 56.9%.
The campus sits in a residential setting.
Over the past 7-year window. Looking back 7 years, enrollment at OSTMANN ELEM. has changed only slightly, going from 359 students in 2018 to 362 in 2025. White enrollment moved from 85% to 80% across the same window.
Within the allk12 community for this school, recent activity here tends to focus on school events, parent volunteer needs, and clubs. Members of the school community can share what they know.
St. Charles County at a glance
View full county profilePopulation
414,535
Census ACS
Median income
$104,692
Household, ACS
Bachelor's+
43%
Adults 25+
Poverty rate
4%
Below federal line
Schools in county
93
59,314 students
Quick facts
Related schools
Other schools in FORT ZUMWALT SCHOOL DISTRICT
- FT. ZUMWALT WEST HIGHHigh · 1,643 students
- FT. ZUMWALT NORTH HIGHHigh · 1,538 students
- FT. ZUMWALT SOUTH HIGHHigh · 1,212 students
- FT. ZUMWALT EAST HIGHHigh · 1,171 students
- FT. ZUWMALT WEST MIDDLEMiddle · 1,114 students
- FT. ZUMWALT NORTH MIDDLEMiddle · 1,019 students
Other schools in O'FALLON
- FT. ZUMWALT WEST HIGHHigh · 1,643 students
- FT. ZUMWALT NORTH HIGHHigh · 1,538 students
- FRONTIER MIDDLEMiddle · 1,243 students
- FT. ZUWMALT WEST MIDDLEMiddle · 1,114 students
- FT. ZUMWALT NORTH MIDDLEMiddle · 1,019 students
- PRAIRIE VIEW ELEM.Elementary · 696 students
Nearby schools
- TWIN CHIMNEYS ELEM.0.6 mi · 488
- DARDENNE ELEM.1.2 mi · 445
- EMGE ELEM.1.2 mi · 348
- FT. ZUWMALT WEST MIDDLE1.5 mi · 1,114
- CROSSROADS ELEM.1.6 mi · 757
- PHEASANT POINT ELEM.1.7 mi · 428
Frequently asked questions
About OSTMANN ELEM.How large is OSTMANN ELEM.?
OSTMANN ELEM. enrolls approximately 362 students in grades KG-05.
What grades does OSTMANN ELEM. serve?
OSTMANN ELEM. serves grades KG-05.
How many students per teacher at OSTMANN ELEM.?
Approximately 12.2:1 students per teacher at OSTMANN ELEM..
How diverse is OSTMANN ELEM.?
OSTMANN ELEM. reports a student body of 80% White, 4% Hispanic, 4% Black, 8% Asian, 3% Two or more.
Who oversees OSTMANN ELEM.?
OSTMANN ELEM. is overseen by FORT ZUMWALT SCHOOL DISTRICT in St. Charles County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.