Best High Schools in Timonium, MD

Timonium, Maryland, is home to a single high school, Dulaney High, which serves grades 9 through 12 as part of the Baltimore County Public Schools district. With an enrollment of 1,889 students, this school presents a fascinating mix of academic strengths and challenges that parents should carefully consider.

Dulaney High is a standout performer in English Language Arts (ELA), with 61.1% of students proficient compared to the district's 46.1% and the state's 51.7%. However, the school struggles significantly in mathematics, where only 14.9% of students are proficient—well below the district average of 21.9% and state average of 27.1%. This math weakness is especially acute in Algebra I, where just 7.4% of students are proficient versus 21.3% statewide. The school's overall state ranking has declined from the 79th percentile (4 stars) in 2023-2024 to the 57th percentile (3 stars) in 2025-2026, not because its scores dropped, but because other schools are improving faster.

Despite these academic challenges, Dulaney High boasts a strong graduation rate of 90.1% and a low dropout rate of 7.7%, both significantly better than district averages. A notable concern is the chronic absenteeism rate of 29.0%, which exceeds the district's 25.6% average. The school serves a moderately diverse socioeconomic population, with 33.25% of students eligible for free or reduced lunch. The district spends $16,400 per student and maintains a student-teacher ratio of 17.9:1. For parents, the key takeaway is that Dulaney High excels in ELA and graduation outcomes but requires significant improvement in mathematics, particularly Algebra I, to match its peers' progress.