| Date | 8 October 2018 — 11:00 | |
|---|---|---|
| Status | YOG | |
| Location | Bosques de Palermo, Green Park, Palermo, Buenos Aires | |
| Participants | 32 from 32 countries | |
| Format | 750 metre swim, followed by 20 km bike, and then 5 km run. | |
| Pos | Competitor | NOC | Time | |||
|---|---|---|---|---|---|---|
| 1 | Dylan McCullough |  NZL | 53:27 | Gold | ||
| 2 | Alexandre Montez |  POR | 53:39 | Silver | ||
| 3 | Alessio Crociani |  ITA | 53:45 | Bronze | ||
| 4 | Andreas Carlsson |  SWE | 53:53 | |||
| 5 | Baptiste Passemard |  FRA | 54:26 | |||
| 6 | Igor Bellido |  ESP | 54:43 | |||
| 7 | Drew Shellenberger |  USA | 54:47 | |||
| 8 | Cristóbal Baeza |  CHI | 54:59 | |||
| 9 | Henry Graf |  GER | 55:07 | |||
| 10 | Calum Young |  GBR | 55:12 | |||
| 11 | Cristian Triana |  COL | 55:28 | |||
| 12 | Javier de la Peña |  MEX | 55:45 | |||
| 13 | Gergely Kiss |  HUN | 55:58 | |||
| 14 | Loic Triponez |  SUI | 56:19 | |||
| 15 | Itamar Shevach Levanon |  ISR | 56:52 | |||
| 16 | Solen Wood |  CAN | 56:56 | |||
| 17 | Gabriel Terán |  ECU | 56:58 | |||
| 18 | Joshua Ferris |  AUS | 57:08 | |||
| 19 | Jan Škrjanc |  SLO | 57:19 | |||
| 20 | Pedro Boff |  BRA | 57:26 | |||
| 21 | Christiaan Stroebel |  RSA | 57:34 | |||
| 22 | Alejandro Rodríguez |  CUB | 57:40 | |||
| 23 | Teppei Tokuyama |  JPN | 57:50 | |||
| 24 | Rik Malcorps |  BEL | 58:23 | |||
| 25 | Mohamed Aziz Sebai |  TUN | 58:54 | |||
| 26 | Daniil Zubtsov |  KAZ | 59:07 | |||
| 27 | Mohamed Tarek |  EGY | 59:42 | |||
| 28 | Hung Tik Long |  HKG | 1-00:13 | |||
| 29 | Chong Xian Hao |  MAS | 1-00:25 | |||
| 30 | Zakaria Alkharrat |  SYR | 1-02:34 | |||
| 31 | Giannon Eights |  ARU | 1-02:34 | |||
| Dominic Pugliese |  ISV | – |