On a black shield, 3 1/2 inches (8.89 cm) high overall, edged with a 1/8 inch (.32 cm) yellow border a white knight on a white horse grasping a lance in right hand detailed black. The knight's cape lined yellow, horse's blanket and bridle yellow. Attached above the shield a black scroll inscribed "RIO LINDA" in yellow letters and edged with a 1/8 inch (.32 cm) yellow border.
Yellow and black are the school colors. A knight on horseback is the school mascot which represents strength, pride and tradition.
The shoulder sleeve insignia was approved on 21 April 1998.