The men's 66 kg competition of the judo events at the 2011 Pan American Games in Guadalajara, Mexico, was held on October 28 at the CODE II Gymanasium. The defending champion was João Derly of Brazil.

Schedule All times are Central Standard Time (UTC-6). Date Time RoundOctober 28, 2011 11:00 PreliminariesOctober 28, 2011 11:32 QuarterfinalsOctober 28, 2011 12:44 RepechageOctober 28, 2011 13:40 SemifinalsOctober 28, 2011 17:00 Bronze medal matchesOctober 28, 2011 17:16 Final

Results Legend

1st number = Ippon 2nd number = Waza-ari 3rd number = Yuko

Bracket Men's -66 kg bracket

Repechage round Two bronze medals were awarded.

References