Middle · Regular · Grades 4 to 8
Joseph Arthur Middle School, O Fallon, IL
Joseph Arthur Middle School is a public middle school in O Fallon, part of Central SD 104. It enrolled 299 students in 2024-25, with 12.5 students per full-time teacher.
Enrollment and teachers
- Students
- 299
- Teachers (FTE)
- 24.0
- Students per teacher
- 12.5
- Grades
- 4 to 8
This school's ratio is 1.1 higher than the district figure of 11.4. The Illinois average across schools is 13.7. Ratios count all teachers, including specialists, so they are lower than typical class sizes.
This school12.5
District11.4
Illinois13.7
United States15.3
School details
- Address
- 160 Saint Ellen Mine Rd, O Fallon, IL 62269
- Phone
- (618)632-6336
- District
- Central SD 104
- County
- St. Clair County
- Level
- Middle
- Type
- Regular
- Status
- Open
- Charter
- No
- Virtual
- No
- Locale
- Suburb: Large
- NCES school ID
- 170917006007
Related schools
Middle schools elsewhere in O Fallon
- Fulton Junior High School O Fallon CCSD 90 School District
- Amelia V Carriel Junior High O Fallon CCSD 90 School District
We publish official enrollment and staffing data, not ratings or test scores.
Source: NCES Common Core of Data 2024-25 and F-33 finance 2020, via the Urban Institute Education Data Portal. Last reviewed October 2026. Blank values are not available, not applicable or suppressed in the source. See the methodology.