Average
#1010 of 1,363 schools in MD
Patterson Mill High School
High School · Harford County Public Schools
85 Patterson Mill Rd, Bel Air, MD 21015
Enrollment
826
Student-Teacher
16.2:1
Score
5.4
Grades
9th – 12th
Enrollment
826
Student-Teacher
16.2:1
Score
5.4
Grades
9th – 12th
Updated
2022-23
Updated 2022-23
How this school compares
In Bel Air
#12 of 16
public schools
Maryland high schools
#98 of 226
In district
#44 of 55
Harford County Public Schools
About Patterson Mill High School
Patterson Mill High School serves grades nine through twelve in Bel Air, a mid-size suburb in Harford County. The school enrolls 826 students and maintains a student-teacher ratio of 16.2:1 with 51 full-time equivalent teachers on staff. Academically, Patterson Mill High School is working to strengthen its performance across core subjects.
In English language arts, 72% of students score at proficient levels or above, showing solid reading and writing fundamentals. Mathematics performance presents an area of focus, with 50% of students meeting proficiency benchmarks. The school's overall academic score of 6.9/10 reflects room for growth as the school supports student development.
Patterson Mill ranks in the 40th percentile statewide, placing it among Maryland's mid-range public high schools. As a regular public high school, Patterson Mill serves the greater Bel Air community and draws from the surrounding suburban area. The school's size and staff-to-student ratio provide a structured environment where students can access support services and participate in typical high school programming.
For families considering Patterson Mill High School, the setting offers a suburban educational experience with opportunities for academic improvement and engagement.
Score Breakdown
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Patterson Mill High School — Students at Patterson Mill High School score 42% proficient, which is below what's typical for similar communities (expected: 59%).
Equity & Diversity
Shown separately, not included in overall scoreFree/Reduced Lunch
23.5%
Students qualifying for federal meal assistance
Test Scores MD MCAP (2024-25)
Based on 8 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: 1.8/10.
How Patterson Mill High School Compares
See how Patterson Mill High School performs across key quality dimensions compared to state benchmarks.
Funding & Resources
Programs & Offerings
Data as of 2020-21 · Source: CRDC via Urban Institute · Learn more
Performance Trends
Math proficiency has declined from 67% (2019) to 13% (2025). Reading/ELA proficiency has remained stable from 72% (2019) to 71.8% (2025).
Location
85 Patterson Mill Rd, Bel Air, MD 21015
Nearby Alternatives
Families considering Patterson Mill High School may also want to explore other high schools in the area. Bel Air High (rated 5.6/10, 2.1 miles away), with a very similar rating. Another option is C. Milton Wright High (rated 5.2/10, 3.8 miles away), with a very similar rating. Additionally, JOHN CARROLL SCHOOL (rated 5.1/10, 2.2 miles away), with a comparable rating. For more schools in Bel Air, see our Bel Air schools guide .
Nearby Schools
20 within 3.3 mi| School | Distance | Rating |
|---|---|---|
| Patterson Mill Middle School Bel Air | 0.0 mi | 5.3 |
| EMMORTON BAPTIST ACADEMY Bel Air | 0.5 mi | 5.7 |
| Ring Factory Elementary Bel Air | 0.6 mi | 7.7 |
| Emmorton Elementary Bel Air | 1.4 mi | 8.1 |
| Homestead/Wakefield Elementary Bel Air | 1.5 mi | 8.1 |
| Bel Air Middle Bel Air | 1.8 mi | 6.2 |
| Abingdon Elementary Abingdon | 2.1 mi | 7.1 |
| William S. James Elementary Abingdon | 2.0 mi | 6.9 |
| JOHN CARROLL SCHOOL Bel Air | 2.2 mi | 5.1 |
| Bel Air High Bel Air | 2.1 mi | 5.6 |
| Fountain Green Elementary Bel Air | 2.6 mi | 8.6 |
| Southampton Middle Bel Air | 2.8 mi | 6.9 |
| Bel Air Elementary Bel Air | 2.6 mi | 7.0 |
| ST MARGARET SCHOOL Bel Air | 2.7 mi | 3.8 |
| HARFORD DAY SCHOOL Bel Air | 3.1 mi | 7.1 |
| C. Milton Wright High Bel Air | 3.8 mi | 5.2 |
| Prospect Mill Elementary Bel Air | 3.8 mi | 7.9 |
| GRACE CLASSICAL ACADEMY Bel Air | 3.2 mi | 5.6 |
| Harford Academy at Campus Hills Bel Air | 4.0 mi | 4.0 |
| THE HIGHLANDS SCHOOL Bel Air | 3.3 mi | 6.3 |
Neighborhood Census ACS (2019-2023)
Census data for ZIP 21015 (ACS 2019-2023 5-Year Estimates) · Data sources
Median Income
$137,219
Median Home Value
$418,400
Median Rent
$1,730/mo
Population
30,451
College Educated
52.2%
Homeownership
90.5%
Avg Commute
32.9 min
Poverty Rate
4.8%
Median Age
40.3
Community Profile
The community surrounding Patterson Mill High School has a median household income of $137,219. It is a well-educated community where 52% of adults hold a bachelor's degree or higher. The median home value in the area is $418,400, with a median rent of $1,730/month. The local poverty rate of 4.8% is relatively low. The average commute for residents is 33 minutes. Source: U.S. Census ACS 2022 5-Year Estimates.
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| Havre de Grace High Havre De Grace, MD | 5.4 |
| Pikesville High Baltimore, MD | 5.4 |
| Southern Garrett High School Oakland, MD | 5.4 |
| George W. Carver Center for Arts & Technology Towson, MD | 5.5 |
| Kent County High Worton, MD | 5.5 |
| Perryville High Perryville, MD | 5.5 |
Frequently Asked Questions
Common questions about Patterson Mill High School
What grades does Patterson Mill High School serve?
Patterson Mill High School serves students in grades 9th through 12th.
How many students attend Patterson Mill High School?
Patterson Mill High School has an enrollment of approximately 826 students.
What is the student-teacher ratio at Patterson Mill High School?
The student-teacher ratio at Patterson Mill High School is 16.2:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.
How does Patterson Mill High School rank in MD?
Patterson Mill High School is ranked #1010 out of 1,363 schools in MD.
What is Patterson Mill High School's MySchoolScout rating?
Patterson Mill High School has a composite rating of 5.4 out of 10 on MySchoolScout. This score combines academic performance, student growth, and school environment into a single score. Equity data is shown separately for context.
What are the test scores at Patterson Mill High School?
Based on the most recent state assessment data, Patterson Mill High School has 48.5% math proficiency and 72.0% reading/ELA proficiency.
Is Patterson Mill High School a charter school?
No, Patterson Mill High School is not a charter school. It is a traditional public school operated by the local school district.
Is Patterson Mill High School a Title I school?
No, Patterson Mill High School is not currently a Title I school.
What does the Free & Reduced Lunch percentage mean for Patterson Mill High School?
23.5% of students at Patterson Mill High School qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.
Explore More Schools
Neighborhood Context
- City Safety
- High (2,245/100K)
FBI UCR 2024. City-level (Bel Air). Data >1 year old.
Quick Facts NCES CCD (SY 2022-23)
- Grades
- 9th – 12th
- Enrollment
- 826
- Student-Teacher Ratio
- 16.2:1
- Teachers (FTE)
- 51
- Free/Reduced Lunch
- 23.5%
- Type
- regular
- Setting
- Midsize Suburb
- County
- Harford County
- Phone
- (410) 638-4640
- Data Year
- 2023–2024
Resources & Links
District
Harford County Public Schools- District Enrollment
- 38,105
- Schools in District
- 55
- Per-Pupil Spending
- $17,493
- District Rank
- #44 of 55
Other Schools in This District
How We Rate Schools
Every school receives a composite score from 1 to 10 based on four pillars: Academic Performance (50%), Student Growth (20%), Equity (15%), and Learning Environment (15%). Scores are built from publicly available data including standardized test results, enrollment figures, and school climate indicators.
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