| Event: | Men's freestyle 66 kg |
| Championship: | 2011 World Championships |
| Dates: | 18 September 2011 |
| Venue: | Sinan Erdem Dome |
| Competitors: | 46 |
| Nations: | 46 |
| Gold: | Mehdi Taghavi |
| Gold Nation: | IRI |
| Silver: | Tatsuhiro Yonemitsu |
| Silver Nation: | JPN |
| Bronze: | Jabrayil Hasanov |
| Bronze Nation: | AZE |
| Bronze2: | Liván López |
| Bronze2 Nation: | CUB |
| Prev: | 2010 |
| Next: | 2013 |
See main article: 2011 World Wrestling Championships.
The men's freestyle 66 kilograms is a competition featured at the 2011 World Wrestling Championships, and was held at the Sinan Erdem Dome in Istanbul, Turkey on 18 September 2011.