18 public K-12 schools in O'fallon from NCES Common Core of Data: enrollment, grade span, demographics, and Civil Rights Data Collection statistics for every active campus.
18 public schools ranked by quality score. NCES CCD 2024-25 data.
The highest-ranked of O'fallon's 18 public schools is Ft. Zumwalt West High, scoring 41/100, against a city average of 47.5/100. Computed live across every O'fallon campus reporting to NCES.
How the O'fallon Public-School Landscape Breaks Down
O'fallon, MO enrolls 12,504 students across 18 public schools reporting to the National Center for Education Statistics. The average student-teacher ratio across the city is 12.5:1, and the composite quality score, derived from student-teacher ratio, counselor access, gifted-program availability, and CRDC attendance data, averages 47.5/100. Schools must report at least five campuses in a city to appear in this listing, which is why very small towns may redirect to the broader county or state view.
The most-resourced campus in O'fallon on this index is Ft. Zumwalt West High, at 41/100 on the Resource Investment Index with 1,643 enrolled students. What the index does and doesn't measure; click any school below for its full component breakdown.
O'fallon spans 2 districts, each filing its own NCES F-33 return, per-pupil spending can vary between neighbouring campuses. Sort the table below by enrollment, level, or district; click any school for its full profile.
O'fallon school enrollment varies 4.7× across entities
O'fallon school enrollment ranges from 348 students (lowest) to 1,643 students (highest), a spread of 1,295 students. That relatively narrow ratio reflects an unusually homogeneous school portfolio for a city this size. Per-school staffing, programme depth, and capital-renovation cycles often diverge inside the same city based on enrollment shape, a 200-student magnet runs a different operational model than a 2,000-student comprehensive high school.
O'fallon student-teacher ratio is 12.5:1 — low (typically associated with smaller schools or per-school staffing investment that often correlates with stronger per-student supports)
student-teacher ratio is the simplest comparative metric but it does not capture the full picture: the ratio counts FTE classroom teachers against total enrollment, push-in specialists, English-language aides, special-education co-teachers, and counselors are not included in most reporting Lower values often correlate with smaller scale and population characteristics rather than higher resource budgets per se.
Most racially and ethnically mixed schools in O'fallon
Ranked by the Simpson student-body diversity index (0-100) from NCES race and ethnicity data, where higher means a more evenly mixed student body. It measures mix, not quality.
The highest-ranked school in O'fallon is Ft. Zumwalt West High with a quality score of 41/100. There are 18 public schools in O'fallon with 12,504 total students.
How many schools are in O'fallon, MO? ▼
O'fallon has 18 public schools with a total enrollment of 12,504 students. Average student-teacher ratio: 12.5:1.
Data from NCES Common Core of Data (CCD) 2024-25 and Civil Rights Data Collection (CRDC) 2021-22. Quality scores based on student-teacher ratio,
counselor access, gifted programs, and attendance. Schools must have 5+ in the city to be listed.
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the NCES Common Core of Data (CCD). Consult a qualified professional before making decisions based on this data.
Read our methodology, which explains how this data is sourced, computed, and verified.
