The oldest is 97, competed in the over 90 football (soccer) wich has stoped.
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jack delreo (57)
The youngest ever Olympic gold medalist is Marjorie Gestring of the United States who was 13 years, 268 days old when she won the gold medal at the 1936 Olympics in Berlin, Germany in the 3-meter springboard diving competition.
The first woman in Australia to win an Olympic gold medal was Sarah 'Fanny' Durack. A swimmer, she won Gold in the 100m freestyle in Stockholm in 1912.
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Oscar Swahn of Sweden who won gold in team running target single shot shooting at the 1912 Games in Stockholm at the age of 64 years, 257 days. At the 1920 Games in Antwerp, Swahn won a silver medal in team running target double shot shooting at the age of 72 years, 279 days to make him the oldest person to win a medal in Olympic history along with the oldest to win gold.
Hercules
Through the 2008 Games in Beijing that would be Greek gymnast Dimitrios Loundras whose Greek team placed second in the parallel bars team event at the 1896 Games in Athens. He was 10 years, 218 days old. In fact there was an unnamed French boy younger, just seven years: http://en.wikipedia.org/wiki/Rowing_at_the_1900_Summer_Olympics#Trivia
That is Oscar Swahn of Sweden who won gold in the 100 meter team running deer shooting event at the 1912 Games in Stockholm. At 64 years of age he became the oldest person to win a gold medal in the Olympics. Swahn is also the oldest person to win a medal in the Olympics, having won silver in the same event eight years later in Antwerp at the age of 72.
The difference in distance or time of first to second place, plus a centimeter or .01 seconds, or clearing the next height.
According to gymnasticszone.com: Oldest Gymnastics Female Gold MedallistAgne Kelleti of Hungary was 35 years and 332 days old when she won medals on floor, balance beam and uneven bars in 1956. Oldest Gymnastics Male Gold MedallistManilo Pastorini was 41 years and 117 days old when he was one of the 27 members of the gold medal Italian team in the 1920 Olympic games. Oldest Gymnastics Medallist -- WomenEthel Seymour who was 46 years and 222 days old won a team medal as a member of Great Britain's bronze-medal winning team at the 1928 Olympic Games. Oldest Gymnastics Medallist -- MenLucien Demanet of France was 45 years and 266 days old when he won a team bronze medal at the 1920 Olympic Games.
Although Wells ran the same time as silver medallist Silvio Leonard of Cuba he was given the verdict based on analysis of the photo finish.