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In the 2011 Giro d'Italia, four different jerseys were awarded. For the general classification, calculated by adding each cyclist's finishing times on each stage, and allowing time bonuses for the first three finishers on mass-start stages, the leader received a pink jersey. This classification was considered the most important of the Giro d'Italia, and the winner was considered the winner of the Giro.

Additionally, there was a points classification, which awarded a red jersey. In the points classification, cyclists got points for finishing in the top 15 in a stage. Unlike in the better known points classification in the Tour de France, the type of stage had no effect on what points were on offer – each stage had the same points available on the same scale. The win earned 25 points, second place earned 20 points, third 16, fourth 14, fifth 12, sixth 10, and one point fewer per place down to a single point for 15th. In addition, points could be won in intermediate sprints.

There was also a mountains classification, the leadership of which was marked by a green jersey. In the mountains classifications, points were won by reaching the top of a climb before other cyclists. Each climb was categorized as either first, second, third, or fourth-category, with more points available for the higher-categorized climbs. The Cima Coppi, the race's highest point of elevation, awarded still more points than the other first-category climbs.

The fourth jersey represented the young rider classification, marked by a white jersey. This was decided the same way as the general classification, but only riders born after 1 January 1986 were eligible.

There were also three classifications for teams. In the Trofeo Fast Team classification, the times of the best three cyclists per team on each stage were added; the leading team was the team with the lowest total time; the Trofeo Super Team was a team points classification, with the top 20 placed riders on each stage earning points (20 for first place, 19 for second place and so on, down to a single point for 20th) for their team; and the Fair Play classification rewarded those teams that best avoided penalty points for minor technical infringements.

The rows in the following table correspond to the jerseys awarded after that stage was run, and shows to whom each jersey would have been awarded each day had Alberto Contador been removed from the standings as the race was ongoing.