| Event: | Men's lightweight |
| Championship: | 2017 World Championships |
| Dates: | 25–26 June 2017 |
| Venue: | Taekwondowon |
| Competitors: | 80 |
| Nations: | 80 |
| Gold: | Maksim Khramtsov |
| Gold Nation: | RUS |
| Silver: | Nikita Rafalovich |
| Silver Nation: | UZB |
| Bronze: | Masoud Hajji-Zavareh |
| Bronze Nation: | IRI |
| Bronze2: | Kairat Sarymsakov |
| Bronze2 Nation: | KAZ |
| Prev: | 2015 |
| Next: | 2019 |
See main article: 2017 World Taekwondo Championships.
The men's lightweight is a competition featured at the 2017 World Taekwondo Championships, and was held at the Taekwondowon in Muju County, South Korea on June 25 and June 26. Lightweights were limited to a maximum of 74 kilograms in body mass.