2018 Marathon Swimming World Series
| Host City |
Setubal |
| Country |
 POR |
| Held |
9 June 2018 |
| Events |
2 |
| Competitors |
6 |
| Countries |
6 |
Events
Medal table
| Pos |
Country |
🥇 Gold |
🥈 Silver |
🥉 Bronze |
Total |
| 1 |
Hungary |
 HUN |
1 |
0 |
0 |
1 |
| = |
United States |
 USA |
1 |
0 |
0 |
1 |
| 3 |
Italy |
 ITA |
0 |
1 |
0 |
1 |
| = |
Netherlands |
 NED |
0 |
1 |
0 |
1 |
| 5 |
Australia |
 AUS |
0 |
0 |
1 |
1 |
| = |
Great Britain |
 GBR |
0 |
0 |
1 |
1 |
Medal winners