| Event: | Men's Greco-Roman 66 kg |
| Championship: | 2010 World Championships |
| Dates: | 6 September 2010 |
| Venue: | Olympic Stadium |
| Competitors: | 36 |
| Nations: | 36 |
| Gold: | Ambako Vachadze |
| Gold Nation: | RUS |
| Silver: | Armen Vardanyan |
| Silver Nation: | UKR |
| Bronze: | Vasıf Arzumanov |
| Bronze Nation: | TUR |
| Bronze2: | Vitaliy Rahimov |
| Bronze2 Nation: | AZE |
| Prev: | 2009 |
| Next: | 2011 |
See main article: 2010 World Wrestling Championships.
The men's Greco-Roman 66 kilograms is a competition featured at the 2010 World Wrestling Championships, and was held at the Olympic Stadium in Moscow, Russia on 6 September.