Best Public Schools in O Fallon, IL

O Fallon, Illinois, has 10 listed schools: six elementary schools, three middle schools, and one high school. Nine are in O Fallon CCSD 90 or O Fallon Township HSD 203; Dawn Elser Elementary School and Joseph Arthur Middle School are in Central School District 104. Across the elementary and middle schools, average 2025–2026 proficiency was above state results in both subjects: elementary averages were 64% in ELA and 57% in math, while middle-school averages were 68% and 51%. The clearest standout is Fulton Junior High School, leading local middle schools in both subjects and scoring 24 percentage points above the state in ELA and 21 points above in math.

Elementary results vary most in math: Delores Moye Elementary School leads in ELA at 74%, while J Emmett Hinchcliffe Senior Elementary School leads in math at 68%. Dawn Elser is lowest in both, at 48% in ELA and 37% in math; the spread from the elementary leader to Elser is 27 points in ELA and 31 in math. The middle-school comparison also favors Fulton: its “All Grades” results are 27 points higher in ELA and 18 points higher in math than Arthur. Amelia V Carriel Junior High is above state results in both subjects; Arthur is 3 points below state in ELA but 3 points above in math. In 8th-grade math, Arthur edges Carriel by 1 point. The only listed high school, O Fallon High School, reports a 96% graduation rate and ACT proficiency above state results in all three subjects.

Recent changes are mixed: the elementary schools’ average math advantage over the state narrowed from 21 to 18 points, while the middle schools’ math advantage widened from 7 to 11 points; middle-school ELA’s advantage narrowed from 16 to 12 points. Individual results differ: Elser’s ELA rose 9 points from the prior year, but its math fell 11 points. Income measures offer context, not an explanation: in 2024–2025, the free/reduced lunch eligible share was 44% at Elser, compared with 19% at Fulton and 25% at Moye. Attendance also varies: Fulton’s chronic absenteeism was 8%, versus 28% at Elser. SchoolDigger’s latest listed ratings give Fulton and O Fallon High four stars, Evans and Elser three, and Arthur two; rankings and stars are not the same as year-to-year test-score change.