| Event: | Men's freestyle 66 kg |
| Championship: | 2013 World Championships |
| Dates: | 16 September 2013 |
| Venue: | László Papp Budapest Sports Arena |
| Competitors: | 40 |
| Nations: | 40 |
| Gold: | David Safaryan |
| Gold Nation: | ARM |
| Silver: | Liván López |
| Silver Nation: | CUB |
| Bronze: | Magomed Kurbanaliev |
| Bronze Nation: | RUS |
| Bronze2: | Ganzorigiin Mandakhnaran |
| Bronze2 Nation: | MGL |
| Prev: | 2011 |
| Next: | 2014 |
See main article: 2013 World Wrestling Championships.
The men's freestyle 66 kilograms is a competition featured at the 2013 World Wrestling Championships, and was held at the László Papp Budapest Sports Arena in Budapest, Hungary on 16 September 2013.