Average
#875 of 1,363 schools in MD
Great Mills High
High School · St. Mary's County Public Schools
21130 Great Mills Rd, Great Mills, MD 20634
Enrollment
1,748
Student-Teacher
19.4:1
Score
5.6
Grades
9th – 12th
Enrollment
1,748
Student-Teacher
19.4:1
Score
5.6
Grades
9th – 12th
Data vintage
2022-23
Data vintage2022-23
How this school compares
Maryland schools
#875 of 1,363
In Great Mills
#2 of 3
public schools
In district
#22 of 26
St. Mary's County Public Schools
Academic growth
7.2 / 10
Very Good
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Great Mills High
High School in Great Mills · grades 9th – 12th. Start here, then compare fit against nearby and district options.
Chesapeake Charter School
0.4 mi away. Use as a geographic alternative in the same move search.
George Washington Carver Elementary
0.4 mi away. Use as a geographic alternative in the same move search.
About Great Mills High
Great Mills High is a public high school in Great Mills, MD, part of St. Mary's County Public Schools. Great Mills High serves approximately 1,748 students, and covers grades 9th-12th, and has a 19.4:1 student-teacher ratio.
Great Mills High has a current MySchoolScout rating of 5.6 out of 10 and ranks #875 of 1,363 schools in MD. Structured state assessment records for Great Mills High show 66% math proficiency (multi-year average, 2009-2025) and 65% reading/ELA proficiency (multi-year average, 2009-2025).
- This school 5.6 · Average
- District avg 6.2
- MD avg 6.1
What Parents Should Know
46% of students at Great Mills High were chronically absent in the 2022-23 school year, above the national average. Chronic absenteeism means missing 15 or more school days, and at high rates it drags on classroom pacing for everyone. Ask what the school does to help families get kids to class consistently.
Score Breakdown
Full Profile · 4/4 metricsView breakdown
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Great Mills High — Students at Great Mills High score 35% proficient, which is below what's typical for similar communities (expected: 36%).
Equity & Diversity
Shown separately, not included in overall scoreFree/Reduced Lunch
55.9%
Students qualifying for federal meal assistance
Test Scores MD MCAP (2024-25)
Based on 28 test records from MD state assessments. About our data
Proficiency Trend
↓ DecliningAverage proficiency (% at or above grade level) across Math & ELA over time.
* COVID-affected year — test participation was uneven nationwide. This data is weighted at 50% in the Growth score calculation.
Source: EdFacts (NCES) and state assessment data. Growth score: 7.2/10.
How Great Mills High Compares
See how Great Mills High performs across key quality dimensions compared to state benchmarks.
Funding & Resources
Programs & Offerings
Data as of 2021-22 · Source: CRDC via Urban Institute · Learn more
Location
21130 Great Mills Rd, Great Mills, MD 20634
Nearby Alternatives
Families considering Great Mills High may also want to explore other high schools in the area. Chesapeake Charter School (rated 8.4/10, 0.4 miles away, in nearby Lexington Park), which scores notably higher. Another option is Evergreen Elementary School (rated 7.3/10, 5.5 miles away, in nearby California), which scores notably higher. Additionally, Hollywood Elementary (rated 7.2/10, 6.9 miles away, in nearby Hollywood), which scores notably higher. For more schools in Great Mills, see our Great Mills schools guide .
Nearby Schools
20 within 7.7 miNeighborhood Census ACS (2019-2023)
Census data for ZIP 20634 (ACS 2019-2023 5-Year Estimates) · Data sources
Median Income
$117,431
Median Home Value
$334,800
Median Rent
$1,689/mo
Population
6,976
College Educated
40.6%
Homeownership
68.3%
Avg Commute
23.9 min
Poverty Rate
4.3%
Median Age
32.3
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| Manchester Valley High Manchester, MD | 5.6 |
| Northeast High Pasadena, MD | 5.6 |
| Sparrows Point High Sparrows Point, MD | 5.6 |
| Maurice J. McDonough High School Pomfret, MD | 5.5 |
| North Caroline High School Ridgely, MD | 5.5 |
| Watkins Mill High Gaithersburg, MD | 5.5 |
Frequently Asked Questions
Common questions about Great Mills High
What grades does Great Mills High serve?
Great Mills High serves students in grades 9th through 12th.
How many students attend Great Mills High?
Great Mills High has an enrollment of approximately 1,748 students.
What is the student-teacher ratio at Great Mills High?
The student-teacher ratio at Great Mills High is 19.4:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.
How does Great Mills High rank in MD?
Great Mills High ranks #875 of 1,363 schools in MD.
What is Great Mills High's MySchoolScout rating?
Great Mills High has a current MySchoolScout rating of 5.6 out of 10. This score combines the level-appropriate components shown in the rating breakdown; equity data is shown separately for context.
What are the test scores at Great Mills High?
Based on loaded state assessment records, Great Mills High has 66% math proficiency (multi-year average, 2009-2025) and 65% reading/ELA proficiency (multi-year average, 2009-2025).
Is Great Mills High a charter school?
No, Great Mills High is not a charter school. It is a traditional public school operated by the local school district.
Is Great Mills High a Title I school?
No, Great Mills High is not currently a Title I school.
What does the Free & Reduced Lunch percentage mean for Great Mills High?
55.9% of students at Great Mills High qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.
Neighborhood Context
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Quick Facts NCES CCD (SY 2022-23)
- Grades
- 9th – 12th
- Enrollment
- 1,748
- Student-Teacher Ratio
- 19.4:1
- Teachers (FTE)
- 90
- Free/Reduced Lunch
- 55.9%
- Type
- regular
- Setting
- Small Suburb
- County
- St. Mary's County
- Chronic Absenteeism (SY 2022-23)
- 45.5%
- Phone
- (301) 863-4001
- 4-Year Graduation
- 86.0%
Resources & Links
District
St. Mary's County Public Schools- District Enrollment
- 17,223
- Schools in District
- 27
- Per-Pupil Spending
- $17,088
- District Rank
- #22 of 26
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