A silver colored metal and enamel device 1 3/16 inches (3.02 cm) in height overall, consisting of a shield blazoned: "Per bend sinister Azure and Argent, in chief the "Old Main" tower Argent (Silver Gray) and in base a silhouette of the "Hiller Cadet" statue couped below waist of the first." Attached below the device a Blue scroll folds of the like, inscribed "TRINITY AREA HIGH SCHOOL" in Silver letters.
Royal blue and white are the school colors. Blue symbolizes devotion, a virtue the cadets have for their country and to each other. White represents perfection, an attribute the cadets reflect in all their goals and accomplishments. Black denotes determination, a trait the cadets possess to achieve personal and academic success. The "Old Main" tower signifies the rich history of the school. Recalling back to the time, when the school was the Trinity Hall Military Academy building; the foundation on which the school has expanded and renovated. The "Hiller Cadet" statue refers to the time, in the 1800's, when the locals called the cadets, "the cadets up on the hill." As the school and community have grown and developed, so has the high school in its preparation of its "Hillers" for their chosen paths after graduation.
The shoulder loop insignia was authorized 30 May 2013.