Ronald Kroon (17 September 1942, Amsterdam – 12 July 2001, Huizen) was a Dutch freestyle swimmer who won two bronze medals at the 1962 European Aquatics Championships. He also competed at the 1960 and 1964 Summer Olympics with the best achievement of 8th place in the 4×100 meters medley relay. Between 1960 and 1964 he was four times national champion and set 12 national records in the 100 m freestyle event. He was the first Dutch athlete to swim 100 meters within 55 seconds.