Patterson Mill Middle and High School is a comprehensive middle and high school situated on a 78-acre campus just south of Bel Air, Maryland, United States. It is part of the Harford County Public Schools system.
Serving 826 students in grades 9-12, Patterson Mill High School ranks in the top 20% of all schools in Maryland for overall test scores (math proficiency is top 30%, and reading proficiency is top 30%).
The percentage of students achieving proficiency in math is 40-44% (which is higher than the Maryland state average of 27%). The percentage of students achieving proficiency in reading/language arts is 70-74% (which is higher than the Maryland state average of 45%).
The student-teacher ratio of 16:1 is higher than the Maryland state level of 14:1.
Minority enrollment is 34% of the student body (majority Hispanic and Black), which is lower than the Maryland state average of 68% (majority Black).
Quick Facts (2025-26)
- Grades: 9-12
- Enrollment: 826 students
- Student-Teacher Ratio: 16:1
- Minority Enrollment: 34%
- Graduation Rate: 96% (Top 20% in MD)
- Overall Testing Rank: Top 20%
- Math Proficiency: 40-44% (Top 30%)
- Reading Proficiency: 70-74% (Top 10%)
- Science Proficiency: <50% (Top 20%)
- Source: National Center for Education Statistics (NCES), MD Dept. of Education
Top Rankings
Patterson Mill High School ranks among the top 20% of public schools in Maryland for:
Category
Attribute
Overall Rank
Reading/Language Arts Proficiency
Science Proficiency
Graduation Rate
School Overview
Patterson Mill High School's student population of 826 students has stayed relatively flat over five school years.
The teacher population of 52 teachers has declined by 7% over five school years.
Grades Offered
Grades 9-12
(Supplemental Virtual)
(Supplemental Virtual)
Total Students
826 students
Gender %
Total Classroom Teachers
52 teachers
Year Founded
2007
School Calendar
Last Day of School
Fri. Jun 12, 2026
School Rankings
Patterson Mill High School ranks within the top 20% of all 1,338 schools in Maryland (based off of combined math and reading proficiency testing data).
The diversity score of Patterson Mill High School is 0.54, which is less than the diversity score at state average of 0.74. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#202 out of 1338 schools
(Top 20%)
(Top 20%)
Math Test Scores (% Proficient)
40-44%
27%
Reading/Language Arts Test Scores (% Proficient)
70-74%
45%
Science Test Scores (% Proficient)
<50%
36%
Student-Teacher Ratio
16:1
14:1
American Indian
n/a
n/a
Asian
8%
7%
Hispanic
10%
23%
Black
9%
33%
White
66%
32%
Hawaiian
n/a
n/a
Two or more races
7%
5%
All Ethnic Groups
Graduation Rate
96%
86%
Participates in the National School Lunch Program (NSLP)
Yes
Eligible for Free Lunch
21%
44%
Eligible for Reduced Lunch
2%
5%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), MD Dept. of Education
School Notes
- School Mascot: Huskies
Profile last updated: 02/09/2025
Frequently Asked Questions
What is Patterson Mill High School's ranking?
Patterson Mill High School is ranked #202 out of 1,338 schools, which ranks it among the top 20% of public schools in Maryland.
What schools are Patterson Mill High School often compared to?
Patterson Mill High Schoolis often viewed alongside schools like C. Milton Wright High School, Bel Air High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
40-44% of students have achieved math proficiency (compared to the 27% MD state average), while 70-74% of students have achieved reading proficiency (compared to the 45% MD state average).
What is the graduation rate of Patterson Mill High School?
The graduation rate of Patterson Mill High School is 96%, which is higher than the Maryland state average of 86%.
How many students attend Patterson Mill High School?
826 students attend Patterson Mill High School.
What is the racial composition of the student body?
66% of Patterson Mill High School students are White, 10% of students are Hispanic, 9% of students are Black, 8% of students are Asian, and 7% of students are Two or more races.
What is the student-teacher ratio of Patterson Mill High School?
Patterson Mill High School has a student ration of 16:1, which is higher than the Maryland state average of 14:1.
What grades does Patterson Mill High School offer ?
Patterson Mill High School offers enrollment in grades 9-12 (Supplemental Virtual).
What school district is Patterson Mill High School part of?
Patterson Mill High School is part of Harford County School District.
School Reviews
3 6/10/2017
This is a fantastic high school under the leadership of Dr. Abel. I have three children who have all graduated in the last four years (2013-2016) from Patterson Mill and they were accepted to the colleges of their choice and satisfactorily prepared to tackle university level work. They participated in award winning music programs, state qualifying athletic teams and were pushed to do their best. Is every teacher a 10? No - there is no perfect school, but the faculty here have grown together over the last 10 years. Parents are super involved at this school and activities are packed - arrive early or it's standing room only. I love my neighborhood and the schools they attended, including Patterson Mill, Emmorton Elementary and Homestead Wakefield Elementary
2 11/15/2012
My kids attend this school because I cannot afford to send them to a private school. There are a number of very committed and qualified instructors there but they seem to be the exception and not the rule. The school is new and likely had to select most of its faculty from individuals whom C. Milton Wright and Bel Air rejected. I do think they are improving though.
Review Patterson Mill High School. Reviews should be a few sentences in length. Please include any comments on:
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