A+
Clayton High
PublicHighGrades 9–12
#1 Mark Twain Circle, Clayton, MO 63105 · (314) 854-6600 · Part of Clayton School District
Students
788
Students per teacher
10:1
Free or reduced lunch
8%
Setting
Suburb
Grades
9–12
What stands out about Clayton High
- School Grade A+: near the top of Illinois’s public schools
- Math proficiency 47 pts above the state
- Reading / language arts 27 pts above the state
- Small classes: 10:1 students per teacher
- Enrollment down 13.2% since 2020
Test scores
EDFacts via Urban Institute Education Data Portal (SY2020-21) · 2020–21Math proficiency82%
State average 35.3%
Reading / language arts72%
State average 45.2%
Location
Directions ↗
#1 Mark Twain Circle, Clayton
Students
Enrollment by grade
Grade 9173
Grade 10216
Grade 11189
Grade 12210
Enrollment over time
908’20
871’21
835’22
844’23
788’24
Down 13.2% since 2020.
Who goes here
White 59%Black 15%Asian 13%Two or more races 9%Hispanic 4%American Indian/Alaska Native <1%
As reported to NCES, share of students with a reported race or ethnicity.
What neighbors say
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Parents talk
Conversations in Town Square that mention Clayton High.
Other schools in Clayton School District
School facts: U.S. Department of Education (NCES), 2024-2025 school year. Scores: EDFacts via Urban Institute Education Data Portal (SY2020-21). The School Grade is our own summary of state test results. Neighbor ratings are opinions, not an official measure of school quality.