Kooyonga was an Irish champion Thoroughbred racehorse who raced from 1990 to 1992. After showing good form as a juvenile, she had a highly successful three-year-old campaign, winning the Group One Irish 1000 Guineas and the Coronation Stakes and being named European Champion Three-Year-Old Filly at the Cartier Racing Awards. She stayed in training as a four-year-old and became the second filly (after Pebbles) to win the Eclipse Stakes.