The 2005 Tour de France was the 92nd Tour de France, taking place from July 2 to July 24, 2005. It comprised 21 stages over 3592.5 km, the winner's average speed was 41.654 km/h. The first stages were held in the département of the Vendée, for the third time in 12 years. The 2005 Tour was announced on October 28, 2004. It was a clockwise route, visiting the Alps before the Pyrenees. Lance Armstrong won this Tour, making it his seventh consecutive Tour victory. He was accompanied on the podium by Ivan Basso and Jan Ullrich, but in 2012 Ullrich's results were annulled. As of 11 February 2012, the Union Cycliste Internationale has not commented if the third place would remain empty, or fourth-place finisher Mancebo would be upgraded to third place. The points classification was won by Thor Hushovd, and the mountains classification by Michael Rasmussen.

The race was seen by 15 million spectators along the road, and by 2 billion viewers on TV.

The traditional prologue on the first day was replaced by an individual time trial of more than twice the length of a standard prologue. This stage crossed from the mainland of France to the Île de Noirmoutier. The most famous route to this island is the Passage du Gois, a road that is under water at high tide. This road was included in the 1999 Tour. Several of the favorites crashed there that year, and ended that stage 7 minutes behind the peloton. This year they took the bridge to the island.

The Tour de France (French pronunciation: [tuʁ də fʁɑ̃s]) is an annual bicycle race held in France and nearby countries. First staged in 1903, the race covers more than 3,600 kilometres (2,200 mi) and lasts three weeks. As the best known and most prestigious of cycling's three "Grand Tours", the Tour de France attracts riders and teams from around the world. The race is broken into day-long segments, called stages. Individual times to finish each stage are aggregated to determine the overall winner at the end of the race. The rider with the lowest aggregate time at the end of each day wears the leader's yellow jersey on the next day of racing. The course changes every year, but the race has always finished in Paris. Since 1975, the climax of the final stage has been along the Champs-Élysées.

The tour typically has 21 days of racing and covers 3,200 kilometres (2,000 mi). The shortest Tour was in 1904 at 2,420 kilometres (1,500 mi), the longest in 1926 at 5,745 kilometres (3,570 mi). The three weeks usually include two rest days, sometimes used to transport riders from a finish in one town to the start in another. The race alternates between clockwise and anticlockwise circuits of France. The first anticlockwise circuit was in 1913. The New York Times said the "Tour de France is arguably the most physiologically demanding of athletic events." The effort was compared to "running a marathon several days a week for nearly three weeks", while the total elevation of the climbs was compared to "climbing three Everests."

France (English ⁱ/ˈfræns/ FRANSS or /ˈfrɑːns/ FRAHNSS; French: [fʁɑ̃s] ( listen)), officially the French Republic (French: République française [ʁepyblik fʁɑ̃sɛz]), is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France extends from the Mediterranean Sea to the English Channel and the North Sea, and from the Rhine to the Atlantic Ocean. It is often referred to as l’Hexagone ("The Hexagon") because of the geometric shape of its territory. It is the largest western European country and it possesses the second-largest exclusive economic zone in the world, covering 11,035,000 km² (4,260,000 sq mi), just behind that of the United States (11,351,000 km² / 4,383,000 sq mi).

Over the past 500 years, France has been a major power with strong cultural, economic, military and political influence in Europe and around the world. During the 17th and 18th centuries, France colonised great parts of North America and Southeast Asia; during the 19th and early 20th centuries, France built the second largest colonial empire of the time, including large portions of North, West and Central Africa, Southeast Asia, and many Caribbean and Pacific Islands.