On an irregular shaped silver metal and enamel device 1 1/8 inches (2.86 cm) in width by 3/4 inch in (1.91 cm) in height, a demi-bulldog outlined and detailed blue, its right forepaw reaching for a cross, base metal, to dexter all surrounded by a red border inscribed "LAS CRUCES HS" above the bulldog and "BULLDAWGS" below in base metal letters.
Royal blue and scarlet are the school's colors. The cross is symbolic of the school's nickname. The "Bulldawg" is the school's mascot.
The shoulder loop insignia was authorized 7 November 2005.