Great Mills High

21130 Great Mills Rd, Great Mills, MD 20634

CSchola Grade
Grades
9–12
High
Students
1,697
Enrolled 2024–25
Students per teacher
19.1 : 1
Full-time teachers
District
St. Mary's County Public Schools
St. Mary's County

Schola Grade C · Average

Letter grade (A–F) · compared with 204 Maryland high schools · How we grade
Test scores45% proficient in math & reading
60thpercentile
Equity27% of low-income students proficient
49thpercentile
Attendance45% chronically absent
32ndpercentile
Graduation rate84% graduate in 4 years
28thpercentile
College readinessAt least 27% take AP, IB or dual-enrollment courses
53rdpercentile
Class size19.1 students per teacher
9thpercentile

Percentiles compare this school with other Maryland high schools; the line marks the middle. Data: test scores 2021–22, graduation and absenteeism 2022–23 (U.S. Department of Education, EDFacts); coursework 2023–24 (Civil Rights Data Collection); staffing 2024–25 (NCES).

About Great Mills High

Great Mills High is a public high school in Great Mills, Maryland, serving grades 9–12. It is part of St. Mary's County Public Schools. The school is located in a small suburb in St. Mary's County.

In the 2024–25 school year, 1,697 students were enrolled, with about 19.1 students for every full-time teacher. That ratio is larger than the typical Maryland high school (15.5 students per teacher). Its Schola Grade is C (average), compared with 204 Maryland high schools.

Grades & enrollment

Students per grade, 2024–25Grades 9–12

Location & nearby schools

21130 Great Mills Rd
Great Mills, MD 20634
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School details

Type
Public School · What this means
Level
High
Grades offered
9–12
Enrollment (2024–25)
1,697 students
Students per teacher
19.1 to 1
AP courses offered
26
Charter school
No
Magnet school
No
Virtual learning
Offers virtual courses
Locale
Suburb — Small
School district
St. Mary's County Public Schools
County
St. Mary's County
NCES school ID
240060001224

Schools near Great Mills High

All 4 schools in Great Mills →

School data comes from the U.S. Department of Education: the National Center for Education Statistics (NCES) Common Core of Data and EDGE school locations (2024–25) and Private School Survey (2023–24), the Civil Rights Data Collection (2023–24), and EDFacts (test results 2021–22; graduation and chronic absenteeism 2022–23), plus other public sources. Please contact the school to confirm enrollment, programs, and other details. How we source data.