Castlio Elementary
818
Students
13.2:1
S:T Ratio
School Snapshot
Key metrics at a glanceStudent-Teacher Ratiostudents per teacher
13:1
A-
Good
Graduation Rate
97%
A+
Excellent
This Week at Castlio – April 20, 2026
125 students practicing on Varsity Tutors
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School Details
Address
1020 Dingledine Rd, St Charles, MO 63304
Phone
(636)851-4300
District
Francis Howell School District
Academic Calendar
2025-2026
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