A silver color shield-shaped metal and enamel device 1 1/8 inches (2.86 cm) in height and width blazoned: Gules, two pales Argent, on a chief convex Azure, between two white mullets a patriot reversed, enhanced and couped at the neck Argent (Silver Gray), on his head, ensigned above the shield, a tricorn hat of the third. Attached across the shield, a Blue arched scroll inscribed "PATAPSCO HIGH SCHOOL" in base metal letters.
Red, white and blue are the school colors and evokes the patriotism, embodied by the school mascot.
The shoulder loop insignia was authorized 13 January 2004.