The 1933 Tour de France was the 27th edition of the Tour de France, taking place from 27 June to 23 July. It consisted of 23 stages over 4,395 km (2,731 mi).

This race featured the introduction of the mountains competition, in which cyclists were challenged to climb the mountains the fastest, with points given to the fastest ascenders. This competition was won by Spaniard Vicente Trueba, who reached 9 of the 16 mountain peaks first.

The time bonus of two minutes had a large influence on the outcome of the race. Thanks to this bonus, Georges Speicher won the race; without the bonus, Italian Giuseppe Martano would have been the winner.

In the 1932 Tour de France, the bonus system had had a major impact on the results: without these bonuses, the difference between the number one and number two would have been only three seconds, but with these bonuses, it became more than 24 minutes. In 1933, the bonus time was reduced: only the winner received two minutes of bonus time.

Since the 1913 Tour de France, the Tour de France had been counter-clockwise. In 1933, this changed, and the race was run clockwise again.

Belgium, Italy, Switzerland, Germany and France entered national teams, consisting of eight cyclists (Les As). Additionally, 40 Les Individuels, cyclists without a team (including two Spaniards and an Austrian), entered the race.

Georges Ronsse, Learco Guerra, Albert Büchi, Kurt Stöpel and André Leducq were the captains of their respective teams.

The French team has been named the best collection of pre-war cyclists. The Belgian team had talented riders, but were split between French-speaking and Dutch-speaking cyclists. The Italian team was headed by Learco Guerra. Guerra had won three stages in the 1933 Giro d'Italia and had been world champion. Tour director Henri Desgrange had named Guerra as probable winner of the race.