Gregory James LeMond (born June 26, 1961) is an American former road racing cyclist. He won the Tour de France three times and the Road Race World Championship twice, becoming the only American male to win the former.

LeMond began his professional cycling career in 1981. Two years later, LeMond became the first American male cyclist to win the Road World Championship. He won the Tour de France in 1986, becoming the first non-European professional cyclist to win the men's Tour. LeMond was accidentally shot with pellets and seriously injured while hunting in 1987. Following the shooting, he underwent two surgeries and missed the next two Tours. At the 1989 Tour, LeMond completed an improbable comeback to win in dramatic fashion on the race's final stage. He successfully defended his Tour title the following year, becoming one of only nine riders to win three or more Tours. LeMond retired from competition in December 1994 and was inducted into the United States Bicycling Hall of Fame in 1996. He was the first professional cyclist to sign a million-dollar contract and the first cyclist to appear on the cover of Sports Illustrated.

During his career, LeMond championed several technological advancements in pro cycling, including the introduction of aerodynamic "triathlon" handlebars and carbon fiber bicycle frames, which he later marketed through his company LeMond Bicycles. LeMond's other business interests have included restaurants, real estate, and consumer fitness equipment. He is also a vocal opponent of performance-enhancing drug use in cycling and is a founding board member of 1in6, a nonprofit charity that assists male victims of child sex abuse.

LeMond was born to Bob and Bertha LeMond on June 26, 1961, in Lakewood, California, and was raised in the Washoe Valley, a ranch country on the eastern slopes of the Sierra Nevada mountain range between Reno, and the family home about 2.5 mi (4.0 km) north of Carson City, Nevada. LeMond has two sisters, Kathy and Karen.

LeMond grew up living an active, outdoor life. Hiking, hunting, skiing, and flyfishing were boyhood pastimes. The ranch country of the Sierra Nevada mountain range lent itself to such pursuits. A hyperactive youngster, LeMond believes that these outdoor activities helped keep him out of trouble. LeMond stated, "I was a boy who just could not sit still. I had trouble focusing in school. Parents and educators then did not have the skill set to diagnose and cope with what we know now was a classic case of attention deficit hyperactivity disorder (ADHD). ADHD certainly was not the frequently medicated childhood disease it is today. My triumph over the symptoms was found atop two thin tires over many dusty miles." He also said, "That's one of the traits. It's the inability to sit down [and listen] to something you are not really interested in and absorb it. If they are interested in it, people with ADD excel in really good ways. When I got into cycling I would say the sport itself took a fog off my brain. I was able to absorb stuff I read. It changed my life."

LeMond attended Earl Wooster High School in Reno but lived too far away to participate in team sports. He soon biked almost daily to high school, often riding home from Wooster, taking a route over Mt. Rose, along to Incline Village, then south on Hwy 28, then downhill to Carson City, then to his home.

LeMond's introduction to cycling came in 1975, thanks to freestyle skiing pioneer Wayne Wong, who recommended the bike as an ideal off-season training aid. LeMond started competing the following year, and after dominating the Intermediate category (13–15) and winning the first 11 races he entered, LeMond received permission to ride against older, more seasoned competitors in the Junior (16–19) category.

In 1977, at age 15, LeMond finished second in the Tour of Fresno to John Howard, then the United States's top road cyclist and the 1971 Pan American Games champion. He caught the attention of Eddie Borysewicz, the US Cycling Federation's national team coach, who described LeMond as "a diamond, a clear diamond." LeMond represented the United States at the 1978 Junior World Championships in Washington, D.C., where he finished ninth in the road race, and again in the 1979 Junior World Championships in Argentina, winning gold, silver and bronze medals—the highlight being his victory in the road race. At age 18, LeMond was selected for the 1980 U.S. Olympic cycling team, the youngest ever to make the team. However, the U.S. boycott of the 1980 Summer Olympics in Moscow prevented him from competing there.