Great Mills High
1,779
Students
19.4:1
S:T Ratio
School Snapshot
Key metrics at a glanceAP Coursescourses offered
29
A+
Excellent
AP Enrollmentof students
22%
C
Good
Student-Teacher Ratiostudents per teacher
19:1
B-
Average
This Week at Great Mills High – April 13, 2026
240 students practicing on Varsity Tutors
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School Details
Address
21130 Great Mills Rd, Great Mills, MD 20634
Phone
(301)863-4001
Website
Visit Website
District
St. Mary's County Public Schools
Academic Calendar
2025-2026
Important dates, holidays, and school events