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For the 2025-26 school year, there are 2 public preschools serving 1,048 students in O Fallon, MO. The top ranked public preschool in O Fallon, MO is John Weldon Elementary School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.

O Fallon, MO public preschools have an average math proficiency score of 70% (versus the Missouri public pre school average of 35%), and reading proficiency score of 70% (versus the 37% statewide average). Pre schools in O Fallon have an average ranking of 10/10, which is in the top 1% of Missouri public pre schools.

Minority enrollment is 28% of the student body (majority Asian and Black), which is less than the Missouri public preschool average of 36% (majority Black).