Men's 66 kg competition in judo at the 2000 Summer Olympics was held on 17 September at the Sydney Convention and Exhibition Centre.
Ilse Heylen is a Belgian judoka. She won the bronze medal at the 2004 Summer Olympics in Athens, Greece.
Juan Carlos Jacinto Jiménez is a Dominican judoka, who played for the extra and half lightweight categories. He won the bronze medal for the 60 kg class at the 1999 Pan American Games in Winnipeg, Manitoba, Canada.
Amin El-Hady is an Egyptian judoka, who played for the half-lightweight category. He is a two-time Olympian and a five-time medalist at the African Judo Championships. He also captured a silver medal for his division at the 2007 All-Africa Games in Algiers, Algeria, losing out to the host nation's Mounir Benamadi.
Gantömöriin Dashdavaa is a Mongolian judoka, who played for the lightweight category. He won a bronze medal for the 66 kg class at the 2002 Asian Games in Busan, South Korea. He also captured two silver medals in the same division at the 2003 Asian Judo Championships in Jeju City, and at the 2004 Asian Judo Championships in Almaty, losing out to South Korea's Jung Bu-Kyung and Kazakhstan's Muratbek Kipshakbayev, respectively.
Kwon Young-woo is a South Korean judoka, who competed in the men's middleweight category. He captured two golds in the 81-kg division at the Summer Universiade, completed a full set of medals at the Asian Judo Championships, and later finished seventh at the 2004 Summer Olympics.
Muratbek Sultanbekovich Kipshakbayev is a Kazakh judoka, who competed in the men's half-lightweight category. He celebrated his victory in front of the Kazakh crowd with a gold medal in the 66-kg division at the 2004 Asian Judo Championships in Almaty, and later represented his nation Kazakhstan at the 2004 Summer Olympics.
Tatyana Sergeyevna Moskvina is a Russian-born Belarusian judoka, who competed in the women's extra-lightweight category. Holding a dual citizenship to compete internationally, Moskvina held the 2003 Belarusian senior title in her own division, picked up a total of seventeen medals in her career, including four from the European Championships, and represented her naturalized nation Belarus in two editions of the Olympic Games. Currently a permanent resident in Minsk and a naturalized Belarusian citizen, Moskvina trained under head coach and sensei Magomed Ramazanov for Dinamo.
Sanna Maria Karolin Askelöf is a Swedish judoka who competed in the women's half-lightweight category. Being raised by a Swedish father and a Norwegian mother and holding a dual citizenship to compete internationally, Askelof held five national senior titles in her own division, picked up a total of twenty-eight medals in her career, and represented her paternal nation Sweden in the 52-kg class at the 2004 Summer Olympics. Throughout most of her sporting career until 2009, Askelof trained as a full-fledged member of the judo squad for Södra Sports Club in Farsta.
Ri Sang-sim is a North Korean judoka who competed in the women's half-lightweight category. She finished fifth in the 52-kg division at the 2003 World Judo Championships in Osaka, Japan, and also represented her nation North Korea at the 2004 Summer Olympics.
Lee Eun-hee is a South Korean judoka, who competed in the women's half-lightweight category. She picked up a total of twelve medals in her career, including two golds each from the 2002 Asian Games in Busan and 2004 Asian Judo Championships in Almaty, Kazakhstan, and represented her nation South Korea in the 52-kg class at the 2004 Summer Olympics.
Bazarbek Orynbayuly Donbay is a Kazakh judoka, who competed in the men's extra-lightweight category. He held three Kazakhstan senior titles in his own division, picked up a total of twelve medals in his career, including a silver from the 2002 Asian Games in Busan, South Korea, and a gold from the 2004 Asian Judo Championships in Almaty, and represented his nation Kazakhstan in two editions of the Olympic Games.
Sagdat Kabirovich Sadykov is a Kazakh judoka, who competed in the men's lightweight category. He picked up five medals in his career, including a silver from the 2004 Asian Judo Championships in Almaty, and competed in two editions of the Olympic Games under two different banners Kyrgyzstan and Kazakhstan, respectively.
Andrew Collett is an Australian judoka, who competed in the men's lightweight category. He held seven Australian senior titles in his own division, picked up a total of sixteen medals in his career, including two golds from the Oceania Championships, and represented his nation Australia in two editions of the Olympic Games. Throughout his sporting career, Collett trained full-time for Caulfield Judo Club in his native Melbourne, under head coach and sensei Arthur Moorshead.
Sonya Chervonsky is an Australian judoka, who competed in the women's extra-lightweight category. Chervonsky captured two Australian titles in her own division, picked up a total of eighteen medals in her career, including two golds from the Oceania Championships, and represented Australia at the 2004 Summer Olympics. Until her retirement from the sport in 2012, Chervonsky remained a member of the University of New South Wales' judo squad under head coach and sensei Warren Rosser and high performance coach John Buckley.
Scott Fernandis is an Australian judoka, who competed in the men's extra-lightweight category. He held the 2003 Australian title in his own division, picked up eight medals in his career, including a bronze from the 2004 Oceania Championships in Noumea, New Caledonia, and represented his nation Australia in the 66-kg class at the 2004 Summer Olympics. Throughout his sporting career, Fernandis trained full-time for the senior team at Marist Judo Club in his native Canberra, under head coach and sensei Arthur Moorshead.
Diana Cecilia Maza Romero is an Ecuadorian judoka. She who competed in the women's half-middleweight category.
Elina Vavailagi Nasaudrodro is a Fijian judoka who competed in the women's lightweight category. She won a bronze medal in the 57-kg division at the 2004 Oceania Judo Championships in Noumea, New Caledonia, and represented her nation Fiji at the 2004 Summer Olympics in Athens at the age of eighteen.
Melvin Méndez Acevedo is a Puerto Rican judoka who competed in the men's half-lightweight category. He picked up a bronze medal in the 66-kg division at the 2010 Central American and Caribbean Games in Mayagüez, attained a fifth-place finish at the 2003 Pan American Games in Santo Domingo, Dominican Republic, and represented his nation Puerto Rico in three editions of the Olympic Games.
Juan José Paz is a Bolivian judoka, who competed in the men's half-lightweight category. Paz qualified as a lone judoka for the Bolivian squad in the men's half-lightweight class (66 kg) at the 2004 Summer Olympics in Athens, by granting a tripartite invitation from the International Judo Federation. He conceded his opening match with a single shido penalty and succumbed to a single leg takedown and a 1–0 score on waza-ari from Australia's Heath Young after five minutes of regulation.
Australia 
