The men's Keirin competition of the cycling events at the 2011 Pan American Games was held on October 20 at the Pan American Velodrome in Guadalajara.

[1] The defending champion is Leonardo Narváez of Colombia.

All times are Central Standard Time (UTC-6).

First 2 riders in each heat qualify to final, while the rest will race in the repechage.

[2] The top two cyclists advanced to the final.