| Event: | Boys' 81 kg |
| Games: | 2014 Summer Youth |
| Venue: | Longjiang Gymnasium |
| Date: | August 18 |
| Competitors: | 21 |
| Nations: | 21 |
| Gold: | Mikhail Igolnikov |
| Goldnoc: | RUS |
| Silver: | Tamazi Kirakozashvili |
| Silvernoc: | GEO |
| Bronze: | Frank de Wit |
| Bronzenoc: | NED |
| Bronze2: | Iván Felipe Silva |
| Bronzenoc2: | CUB |
| Prev: | 2010 |
| Next: | 2018 |
The Boys' 81 kg tournament in Judo at the 2014 Summer Youth Olympics was held on August 18 at the Longjiang Gymnasium.
This event was the second-heaviest of the boys' judo weight classes, limiting competitors to a maximum of 81 kilograms of body mass. The tournament bracket consisted of a single-elimination contest culminating in a gold medal match. There was also a repechage to determine the winners of the two bronze medals. Each judoka who had lost before the finals competed in the repechage with the two finalists getting bronze medals.