Competitors for 2018 Marathon Swimming World Series
| Athlete | Country | Sports | Date of birth |
|---|---|---|---|
| Samantha Arévalo |  ECU |
OWS/SWI | 30 September 1994 |
| Rachele Bruni |  ITA |
OWS/SWI | 4 November 1990 |
| Fernando Ponte |  BRA |
OWS | 18 July 1992 |
| Christian Reichert |  GER |
OWS | 7 February 1985 |
| Dario Verani | ITA |
OWS | 1 January 1995 |
| Xin Xin |  CHN |
OWS | 6 November 1996 |