Dulaney High School is a secondary school in Timonium, Baltimore County, Maryland, United States. The school serves a generally upper-middle class suburban community, with students from Timonium and surrounding areas in Baltimore County. It is situated on 45 acres adjacent to Dulaney Valley Memorial Gardens.
Serving 1,889 students in grades 9-12, Dulaney High School ranks in the top 30% of all schools in Maryland for overall test scores (math proficiency is top 20%, and reading proficiency is top 20%).
The percentage of students achieving proficiency in math is 55% (which is higher than the Maryland state average of 27%). The percentage of students achieving proficiency in reading/language arts is 50% (which is higher than the Maryland state average of 45%).
The student-teacher ratio of 18:1 is higher than the Maryland state level of 14:1.
Minority enrollment is 58% of the student body (majority Black and Hispanic), which is lower than the Maryland state average of 69% (majority Black and Hispanic).
Quick Facts (2026)
- Grades: 9-12
- Enrollment: 1,889 students
- Student-Teacher Ratio: 18:1
- Minority Enrollment: 58%
- Graduation Rate: 93% (Top 50% in MD)
- Overall Testing Rank: Top 30%
- Math Proficiency: 55% (Top 20%)
- Reading Proficiency: 50% (Top 50%)
- Science Proficiency: 26% (Btm 50%)
- Source: National Center for Education Statistics (NCES), MD Dept. of Education
Top Rankings
Dulaney High School ranks among the top 20% of public schools in Maryland for:
Category
Attribute
Math Proficiency
Diversity
School Overview
Dulaney High School's student population of 1,889 students has stayed relatively flat over five school years.
The teacher population of 105 teachers has declined by 6% over five school years.
Grades Offered
Grades 9-12
(Supplemental virtual)
(Supplemental virtual)
Total Students
1,889 students
Total Classroom Teachers
105 teachers
Year Founded
1965
Colors
White, Black, Red
School Calendar
School Motto
Dulaney is built upon the rock….a strong, supportive foundation based on tradition to encourage our students to give their best efforts day in and day out to achieve their goals.
School Rankings
Dulaney High School ranks within the top 30% of all 1,338 schools in Maryland (based off of combined math and reading proficiency testing data).
The diversity score of Dulaney High School is 0.73, 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
#329 out of 1338 schools
(Top 30%)
(Top 30%)
Math Test Scores (% Proficient)
55%
27%
Reading/Language Arts Test Scores (% Proficient)
50%
45%
Science Test Scores (% Proficient)
26%
36%
Student-Teacher Ratio
18:1
14:1
American Indian
n/a
n/a
Asian
12%
7%
Hispanic
21%
24%
Black
21%
32%
White
42%
31%
Hawaiian
n/a
n/a
Two or more races
4%
6%
All Ethnic Groups
Graduation Rate
93%
86%
Participates in the National School Lunch Program (NSLP)
Yes
Eligible for Free Lunch
29%
46%
Eligible for Reduced Lunch
4%
5%
School Statewide Testing
School District Name
Baltimore County School District
Source: National Center for Education Statistics (NCES), MD Dept. of Education
Frequently Asked Questions
What is Dulaney High School's ranking?
Dulaney High School is ranked #329 out of 1,338 schools, which ranks it among the top 30% of public schools in Maryland.
What schools are Dulaney High School often compared to?
Dulaney High Schoolis often viewed alongside schools like Hereford High School, Towson High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
55% of students have achieved math proficiency (compared to the 27% MD state average), while 50% of students have achieved reading proficiency (compared to the 45% MD state average).
What is the graduation rate of Dulaney High School?
The graduation rate of Dulaney High School is 93%, which is higher than the Maryland state average of 86%.
How many students attend Dulaney High School?
1,889 students attend Dulaney High School.
What is the racial composition of the student body?
42% of Dulaney High School students are White, 21% of students are Black, 21% of students are Hispanic, 12% of students are Asian, and 4% of students are Two or more races.
What is the student-teacher ratio of Dulaney High School?
Dulaney High School has a student ration of 18:1, which is higher than the Maryland state average of 14:1.
What grades does Dulaney High School offer ?
Dulaney High School offers enrollment in grades 9-12 (Supplemental virtual).
What school district is Dulaney High School part of?
Dulaney High School is part of Baltimore County School District.
School Reviews
5 10/10/2025
I loved their academic programs and the wide range of available extracurricular activities. The facility is absolutely beautiful. I'm sending my daughter there.
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