Darlene Roland, 18, voted for the first time on Tuesday.
The Perry Hall senior was joined by her father, Jon Roland, a popular physics teacher at the high school.
Paul, who recently campaigned at the University of Maryland, College Park, is projected to come in fourth place behind other fellow presidential candidates in Maryland.
Sitting in the grass with their homemade signs and banner, the father, daughter pair explained why they support Paul.
Watch the video to hear their answers.
Are young people more or less involved in politics than in past elections? Tell us in the comments.