The top reported proficiency rate is 71% in English language arts. The lowest is 65% in Math.
Original Research by School Decision on Ostmann Elem.
Ostmann Elementary serves kindergarten through fifth grade as part of the Fort Zumwalt School District in O’Fallon, Missouri. O’Fallon is a large, auto-oriented suburb along Interstates 64 and 70, with residential subdivisions, strip shopping centers, and a significant employment base from employers like Mastercard and True Manufacturing. The city has experienced steady population growth and has a housing stock with very low vacancy. The Fort Zumwalt district covers most of O’Fallon, and the district brief turned up no major recent changes affecting families, so parents can expect operational stability.
The school’s student body is majority white, with a smaller but present share of Asian students and still smaller shares of Hispanic, Black, two-or-more-races, and American Indian or Alaska Native students. A very small share of students qualify for free or reduced-price lunch. That economic profile is notably low compared to many public schools, and the school does not appear to operate as a Title I school.
On state assessments, Ostmann posted proficiency rates that place it well above its peer districts in St. Charles County, a group that includes five districts. In math, the share of students scoring proficient or advanced was above the midpoint of the county’s districts in third, fourth, and fifth grade. In English language arts, third and fourth graders also performed at a level that put the school clearly ahead of the county median. Fifth-grade ELA results were suppressed, so no public score is available for that grade. Fifth-grade science results were also suppressed. Suppressed data often reflects small subgroup sizes, and a parent who wants a complete picture of fifth-grade outcomes should ask the school directly.
The school’s overall proficiency index across all tested subjects and grades lands in the top quartile of the county’s districts. That is a strong position, and it aligns with the district’s general reputation. Academic trends data is limited to a single year of reporting, so there is no multi-year trajectory to assess.
Ostmann is a regular public school with no charter or magnet status. No information about discipline rates, staffing ratios, chronic absenteeism, or special education and English learner enrollment was available in the data provided. A parent with a child who needs specialized support should reach out to the school to confirm what services are in place. There is also no publicly listed information about before- or after-school programs, enrichment offerings, or the school’s specific curriculum approach.
Housing in the area is priced above national and state benchmarks, consistent with a desirable suburban school market. Rents are also above the national norm by a modest margin. The combination of a low-poverty enrollment, strong test results, and competitive housing costs creates a profile that appeals to families who prioritize high-proficiency elementary education and can afford the local market. Parents whose priority is an academically strong, demographically stable K-5 building with performance that tops its county peers will find that here. The main gaps are the missing fifth-grade and science scores, the absence of trend data, and the lack of publicly disclosed staffing or discipline metrics, which any prospective parent should follow up on directly.
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