| Event: | Men's Greco-Roman 120 kg |
| Championship: | 2009 World Championships |
| Dates: | 27 September 2009 |
| Venue: | Messecenter Herning |
| Competitors: | 30 |
| Nations: | 30 |
| Gold: | Mijaín López |
| Gold Nation: | CUB |
| Silver: | Dremiel Byers |
| Silver Nation: | USA |
| Bronze: | Jalmar Sjöberg |
| Bronze Nation: | SWE |
| Bronze2: | Rıza Kayaalp |
| Bronze2 Nation: | TUR |
| Prev: | 2007 |
| Next: | 2010 |
See main article: 2009 World Wrestling Championships.
The men's Greco-Roman 120 kilograms is a competition featured at the 2009 World Wrestling Championships, and was held at the Messecenter Herning exhibition center in Herning, Denmark on September 27.
This Greco-Roman wrestling competition consists of a single-elimination tournament, with a repechage used to determine the winner of two bronze medals.