Competitors for 2019 Marathon Swimming World Series
| Athlete | Country | Sports | Date of birth |
|---|---|---|---|
| Arianna Bridi |  ITA |
OWS | 6 November 1995 |
| Rachele Bruni | ITA |
OWS/SWI | 4 November 1990 |
| Hau-Li Fan |  CAN |
OWS | 8 September 1997 |
| Anna Olasz |  HUN |
OWS/SWI | 19 September 1993 |
| Kristóf Rasovszky | HUN |
OWS/SWI | 27 March 1997 |
| Dario Verani | ITA |
OWS | 1 January 1995 |