| Competition type | Youth Olympic Games | 
|---|---|
| Number and Year | III / 2018 | 
| Host city | Buenos Aires, Argentina (Venues) | 
| Opening ceremony | 6 October | 
| Closing ceremony | 18 October | 
| Competition dates | 6 – 18 October | 
| OCOG | Buenos Aires Youth Olympic Games Organising Committee | 
| Participants | 3977 from 206 countries | 
| Medal events | 239 in 39 disciplines | 
| Other events | 3 in 3 disciplines | 
Bid voting at an Extraordinary IOC Session in Lausanne, Switzerland on 4 July 2013.
| Round 1 | Round 2 | ||
|---|---|---|---|
| Buenos Aires | Argentina | 40 | 49 | 
| Medellin | Colombia | 32 | 39 | 
| Glasgow | Scotland, UK | 13 | – | 
| Officially opened by | Mauricio Macri |  ARG | President | |
|---|---|---|---|---|
| Torchbearer | Paula Pareto |  ARG | JUD | Lit flame | 
| Santiago Lange |  ARG | SAL | Lit flame | |
| Taker of the Athlete's Oath | Teresa Romairone |  ARG | SAL | |
| Taker of the Official's Oath | Lorena Mac |  ARG | BHA/HBL | |
| Taker of the Coach's Oath | Carlos José Retegui |  ARG | HO5/HOC | |
| Olympic Flag Bearer | Leonardo Gutiérrez |  ARG | BKB | Bearer (Senior) | 
| Carlos Weber |  ARG | VVO | Bearer (Senior) | |
| Serena Amato |  ARG | SAL | Bearer (Senior) | |
| Karina Masotta |  ARG | HOC | Bearer (Senior) | |
| Magdalena Aicega |  ARG | HOC | Bearer (Senior) | |
| Carlos Espínola |  ARG | SAL | Bearer (Senior) | |
| Martina Campi |  ARG | EJP | Bearer (Youth) | |
| Francisco Saubidet |  ARG | SAL | Bearer (Youth) | |
| Fernanda Russo |  ARG | SHO | Bearer (Youth) | |
| Lautaro Bazán |  ARG | RU7 | Bearer (Youth) | |
| Braian Toledo |  ARG | ATH | Bearer (Youth) | |
| María Baldoni |  ARG | HOC | Bearer (Youth) | |
| Flagbearers | Full list | 
| Automobile Racing | Polo | Squash | 
| Athlete | Nat | Gold | Silver | Bronze | Total | 
|---|---|---|---|---|---|
| Kliment Kolesnikov |  ROC  RUS | 6 | 1 | 0 | 7 | 
| Andrey Minakov |  ROC  RUS | 6 | 1 | 0 | 7 | 
| Takeru Kitazono |  JPN | 5 | 1 | 0 | 6 | 
| Daniil Markov |  RUS | 3 | 3 | 0 | 6 | 
| Polina Yegorova |  RUS | 3 | 1 | 2 | 6 | 
| Anastasiya Makarova |  RUS | 3 | 1 | 1 | 5 | 
| Darya Vaskina |  RUS | 3 | 1 | 1 | 5 | 
| Kristóf Milák |  HUN | 3 | 1 | 0 | 4 | 
| Vladislav Gerasimenko |  RUS | 3 | 1 | 0 | 4 | 
| Giorgia Villa |  ITA | 3 | 1 | 0 | 4 |