| Event: | Men's welterweight |
| Championship: | 2009 World Championships |
| Dates: | 14 October 2009 |
| Venue: | Ballerup Super Arena |
| Competitors: | 64 |
| Nations: | 64 |
| Gold: | Steven López |
| Gold Nation: | USA |
| Silver: | Nicolás García |
| Silver Nation: | ESP |
| Bronze: | Sébastien Michaud |
| Bronze Nation: | CAN |
| Bronze2: | Rashad Ahmadov |
| Bronze2 Nation: | AZE |
| Bronze2 Variant: | 1991 |
| Prev: | 2007 |
| Next: | 2011 |
See main article: 2009 World Taekwondo Championships.
The Men's Welterweight is a competition featured at the 2009 World Taekwondo Championships, and was held at the Ballerup Super Arena in Copenhagen, Denmark on October 14. Welterweights were limited to a maximum of 80 kilograms in body mass.