Towson High School is a high school in Baltimore County, Maryland, United States, founded in 1873. The school's current stone structure was built in 1949. Located in the northern Baltimore suburb of Towson and serving the surrounding communities of Towson, Lutherville, and Ruxton, it is part of the Baltimore County Public Schools system, the 25th largest school system in the nation as of 2005. Area middle schools that feed into Towson High are Dumbarton Middle School, Ridgely Middle School, and Loch Raven Technical Academy, although students from other areas attend the Law and Public Policy magnet school.

Towson is an unincorporated community and a census-designated place in Baltimore County, Maryland, United States. The population was 55,197 as of the 2010 census. It is the county seat of Baltimore County and the second-most populous unincorporated county seat in the United States.