Elisa Au (born May 29, 1981, in Honolulu, Hawaii) is an American martial arts instructor and karate practitioner.

In 1990, Au competed in her first major tournament the AAU/United States National Karate Championships in New Orleans, Louisiana.

Several of her students went on to become national champions, including one who would win two junior world championships.

In addition to her demanding karate schedule, she participated in figure skating, gymnastics, canoe paddling, and track and field, while attending Punahou School — an elite college preparatory academy in Hawaii.

In addition to competition, she teaches seminars around the world, including Japan, Canada, Australia and the U.S. She also stars in a six-set DVD series entitled SECRETS of Championship Karate that shares her training methods and ideas along with tips on how to succeed in karate competition.