Old Mill High School is a public high school in Millersville, Maryland, serving students in grades 9 through 12. It was occupied in 1975 and is administered by Anne Arundel County Public Schools. The school was built to alleviate overcrowding at Arundel and Severna Park High Schools.
Serving 2,489 students in grades 9-12, Old Mill High School ranks in the top 50% of all schools in Maryland for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).
The percentage of students achieving proficiency in math is 24% (which is lower than the Maryland state average of 27%). The percentage of students achieving proficiency in reading/language arts is 54% (which is higher than the Maryland state average of 45%).
The student-teacher ratio of 17:1 is higher than the Maryland state level of 14:1.
Minority enrollment is 67% of the student body (majority Black), which is lower than the Maryland state average of 68% (majority Black).
Quick Facts (2025)
- School Type: Magnet School
- Grades: 9-12
- Enrollment: 2,489 students
- Student-Teacher Ratio: 17:1
- Minority Enrollment: 67%
- Graduation Rate: 91% (Top 50% in MD)
- Overall Testing Rank: Top 50%
- Math Proficiency: 24% (Btm 50%)
- Reading Proficiency: 54% (Top 50%)
- Science Proficiency: 42% (Top 50%)
- Source: National Center for Education Statistics (NCES), MD Dept. of Education
Top Rankings
Old Mill High School ranks among the top 20% of public schools in Maryland for:
Category
Attribute
Diversity
School Overview
Old Mill High School's student population of 2,489 students has grown by 12% over five school years.
The teacher population of 145 teachers has grown by 8% over five school years.
School Type
Grades Offered
Grades 9-12
(Supplemental Virtual)
(Supplemental Virtual)
Total Students
2,489 students
Gender %
Total Classroom Teachers
145 teachers
Year Founded
1975
First Day of School
Mon. Sep 1, 2025
School Motto
One team, One goal: Building powerful learners.
School Rankings
Old Mill High School ranks within the top 50% of all 1,338 schools in Maryland (based off of combined math and reading proficiency testing data).
The diversity score of Old Mill High School is 0.72, 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
#550 out of 1338 schools
(Top 50%)
(Top 50%)
Math Test Scores (% Proficient)
24%
27%
Reading/Language Arts Test Scores (% Proficient)
54%
45%
Science Test Scores (% Proficient)
42%
36%
Student-Teacher Ratio
17:1
14:1
American Indian
n/a
n/a
Asian
4%
7%
Hispanic
20%
23%
Black
37%
33%
White
33%
32%
Hawaiian
n/a
n/a
Two or more races
6%
5%
All Ethnic Groups
Graduation Rate
91%
86%
Participates in the National School Lunch Program (NSLP)
Yes
Eligible for Free Lunch
39%
44%
Eligible for Reduced Lunch
6%
5%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), MD Dept. of Education
School Notes
- School Mascot: Patriot
Profile last updated: 02/09/2025
Frequently Asked Questions
What is Old Mill High School's ranking?
Old Mill High School is ranked #550 out of 1,338 schools, which ranks it among the top 50% of public schools in Maryland.
What percent of students have achieved state testing proficiency in math and reading?
24% of students have achieved math proficiency (compared to the 27% MD state average), while 54% of students have achieved reading proficiency (compared to the 45% MD state average).
What is the graduation rate of Old Mill High School?
The graduation rate of Old Mill High School is 91%, which is higher than the Maryland state average of 86%.
How many students attend Old Mill High School?
2,489 students attend Old Mill High School.
What is the racial composition of the student body?
37% of Old Mill High School students are Black, 33% of students are White, 20% of students are Hispanic, 6% of students are Two or more races, and 4% of students are Asian.
What is the student-teacher ratio of Old Mill High School?
Old Mill High School has a student ration of 17:1, which is higher than the Maryland state average of 14:1.
What grades does Old Mill High School offer ?
Old Mill High School offers enrollment in grades 9-12 (Supplemental Virtual).
What school district is Old Mill High School part of?
Old Mill High School is part of Anne Arundel County School District.
In what neighborhood is Old Mill High School located?
Old Mill High School is located in the South Gate neighborhood of Millersville, MD. There are 3 other public schools located in South Gate.
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