Robert George Windle (born 7 November 1944) is an Australian freestyle swimmer of the 1960s, who won four Olympic medals, including an individual gold medal. Windle won the 1500 m freestyle and took bronze in the 4 × 100 m freestyle relay at the 1964 Summer Olympics in Tokyo, and silver and bronze in the 4 × 200 m and 4 × 100 m freestyle relays respectively at the 1968 Summer Olympics. Known for his versatility, he is the only male swimmer to represent Australia at the Olympics in all freestyle distances from 100 m to 1500 m. During his career, Windle set six world records and won six Commonwealth Games gold medals. He won 19 Australian championships in all distances from 220 yd to 1650 yd.