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The Women's keirin at the 2012 UCI Track Cycling World Championships was held on April 7. 22 athletes participated in the contest. After the 4 qualifying heats, the 2 fastest rider in each heat advanced to the second round. The riders that did not advance to the second round raced in 4 repechage heats. The first rider in each heat advanced to the second round along with the 8 that qualified before.
The first 3 riders from each of the 2 Second Round heats advanced to the Final and the remaining riders raced a consolation 7–12 final.