Ewa Kłobukowska

Ewa Janina Kłobukowska (born 1 October 1946) is a Polish former sprinter. She competed at the 1964 Olympics in the 4 × 100 m relay and 100 m sprint and won a gold and a bronze medal, respectively. She also won two gold and one silver medal at the 1966 European Athletics Championships. Kłobukowska set three world records, one in the 100 m (11.1 s, 9 July 1965 in Prague) and two in the 4 × 100 m relay (44.2 s, 13 September 1964, Łódź and 43.6 s, 21 October 1964, Tokyo).

Kłobukowska was at one point considered to be the fastest woman in the world. The American Press made a statement, saying that nobody would beat Kłobukowska for the next 7–8 years following a race in Prague. Despite these successes and laurels, her records were annulled by the International Association of Athletics Federations (IAAF) after a sex identification test in 1967 incorrectly labeled her as not female. The test procedures were later determined to be inadequate.