Italy competed at the 2000 Summer Olympics in Sydney, Australia. 361 competitors, 246 men and 115 women, took part in 175 events in 29 sports.
New Zealand competed at the 2000 Summer Olympics in Sydney, Australia. The New Zealand Olympic Committee was represented by 151 athletes and 100 officials at these Summer Olympics.
South Africa competed at the 2000 Summer Olympics in Sydney, Australia.
The People's Republic of China competed at the 2000 Summer Olympics in Sydney, Australia. The team excluded athletes from the Special Administrative Region of Hong Kong, after the territory's return to Chinese rule in 1997, and which competed separately as Hong Kong, China.
Argentina competed at the 2000 Summer Olympics in Sydney, Australia. 143 competitors, 98 men and 45 women, took part in 98 events in 21 sports.
Austria competed at the 2000 Summer Olympics in Sydney, Australia. 92 competitors, 55 men and 37 women, took part in 68 events in 17 sports.
Cuba competed at the 2000 Summer Olympics held in Australia's largest city, Sydney. 229 competitors, 147 men and 82 women, took part in 135 events in 24 sports.
Poland competed at the 2000 Summer Olympics in Sydney, Australia. 187 competitors, 129 men and 58 women, took part in 133 events in 20 sports.
Belarus competed at the 2000 Summer Olympics in Sydney, Australia. 139 competitors, 72 men and 67 women, took part in 109 events in 20 sports. Belarus had its best ever showing both in terms of gold and overall medals at these games. The gold medal result will be later matched in 2008.
Egypt competed at the 2000 Summer Olympics in Sydney, Australia. 89 competitors, 74 men and 15 women, took part in 64 events in 20 sports. Egyptian competitors did not win any medal at the Sydney Olympics.
Morocco competed at the 2000 Summer Olympics in Sydney, Australia.
Malaysia competed at the 2000 Summer Olympics in Sydney, Australia.
Slovakia competed at the 2000 Summer Olympics in Sydney, Australia.
Romania competed at the 2000 Summer Olympics in Sydney, Australia. 145 competitors, 71 men and 74 women, took part in 116 events in 16 sports. At the Games, there was some controversy when gymnast Andreea Răducan was stripped of her individual all-around gold medal after testing positive for a stimulant. Răducan had taken cold medicine containing pseudoephedrine given to her by a team doctor.
Pakistan competed at the 2000 Summer Olympics in Sydney, Australia.
Nigeria competed at the 2000 Summer Olympics in Sydney, Australia.
Kenya competed at the 2000 Summer Olympics in Sydney, Australia.
Athletes from the Federal Republic of Yugoslavia competed at the 2000 Summer Olympics in Sydney, Australia. 109 competitors, 92 men and 17 women, took part in 50 events in 14 sports. These would be the last Summer Games in which athletes from Montenegro and Serbia participated under the name of Yugoslavia. They would compete as Serbia and Montenegro at the 2004 Summer Olympics.
Cameroon competed at the 2000 Summer Olympics in Sydney, Australia. The men's football team won the nation's first Olympic gold medal.
The United States of America (USA), the previous host of the 1996 Olympics at Atlanta, competed at the 2000 Summer Olympics in Sydney, Australia. 586 competitors, 333 men and 253 women, took part in 265 events in 31 sports.
