975
311 men competed in those Olympics in Athens. They were all men.
A total of 464 athletes competed in the 1928 Winter Olympics (438 men, 26 women).
2500+
258 athletes competed in the 1924 Winter Olympics.
10,768 (5,992 men, 4,776 women)
According to answers.com, 3,523 women and 6,797 men competed at the 1996 Games in Atlanta.
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276 including women and men.
Golf was competed at 2 Olympics, the 1900 Games in Paris and the 1904 Games in St. Louis: Men's Individual - 1900 - Charles Sands, United States 1904 - George Lyon, Canada Women's Individual - 1900 - Margaret Abbott, United States Men's Team - 1904 - United States
6294 men and 4608 women competed at the 2008 Games in Beijing.
1900
Through the 2008 Games in Beijing, 6. 1) Isménia do Frederico - competed in women's 100 meter dash athletics at the 1996 and 2000 Olympics. 2) António Carlos Piña - competed in men's marathon athletics at the 1996, 2000, and 2004 Olympics. 3) Henry Andrade - competed in men's 110 meter hurdles athletics at the 1996 Olympics. 4) Vânia Monteiro - competed in women's individual rhythmic gymnastics at the 2004 and 2008 Olympics. 5) Flavio Furtado - competed in men's light-heayweight class boxing at the 2004 Olympics. 6) Nelson Cruz - competed in men's marathon athletics at the 2008 Olympics. For the 2012 Games in London, Adysângela Moniz has qualified to compete in women's heavyweight class judo. Nelson Cruz and Lidiane Lopes are expected to compete in athletics.