These are the lists as posted by World Triathlon, but I expect many changes until race day. For example, I’d be very surprised to see Kyle Smith racing, and Taylor Knibb has also hinted that she has ended her season after Marbella.
Prize Money
Qatar T100 has a total prize purse of 250.000 US$, paying 20 deep.
Male Race Participants
| Name | Nation | Age |
| Gregory Barnaby | ITA | 34 |
| Antonio Benito Lopez | ESP | 31 |
| Jake Birtwhistle | AUS | 30 |
| Rico Bogen | GER | 25 |
| Samuel Dickinson | GBR | 28 |
| Jelle Geens | BEL | 31 |
| Pieter Heemeryck | BEL | 36 |
| Wilhelm Hirsch | GER | 27 |
| Youri Keulen | NED | 27 |
| Menno Koolhaas (KQ) | NED | 30 |
| Sam Long (KQ) | USA | 29 |
| Vincent Luis | FRA | 36 |
| Nicolas Mann | GER | 25 |
| Mathis Margirier | FRA | 28 |
| Guillem Montiel Moreno | ESP | 26 |
| Mika Noodt | GER | 25 |
| Morgan Pearson | USA | 32 |
| Mike Phillips | NZL | 34 |
| Henry Raeppo | EST | 27 |
| Jonas Schomburg | GER | 31 |
| Kyle Smith | NZL | 28 |
| Marten Van Riel | BEL | 32 |
| Jason West | USA | 32 |
| Hayden Wilde | NZL | 28 |
Female Race Participants
| Name | Nation | Age |
| Hannah Berry | NZL | 35 |
| Leana Bissig | SUI | 26 |
| Lucy Byram | GBR | 26 |
| Lucy Charles-Barclay (AQ) | GBR | 32 |
| Marlene De Boer | NED | 37 |
| Hanne De Vet | BEL | 27 |
| Julie Derron | SUI | 29 |
| Diede Diederiks | NED | 34 |
| Paula Findlay | CAN | 36 |
| Ashleigh Gentle | AUS | 34 |
| Kaidi Kivioja | EST | 32 |
| Taylor Knibb | USA | 27 |
| Holly Lawrence | GBR | 35 |
| Jessica Learmonth | GBR | 37 |
| India Lee | GBR | 37 |
| Megan McDonald | GBR | 28 |
| Sara Perez Sala | ESP | 37 |
| Lisa Perterer | AUT | 34 |
| Caroline Pohle | GER | 30 |
| Lizzie Rayner | GBR | 28 |
| Ellie Salthouse | AUS | 32 |
| Imogen Simmonds | SUI | 32 |
| Taylor Spivey | USA | 34 |
| Georgia Taylor-Brown | GBR | 31 |
| Grace Thek | AUS | 34 |
| Els Visser | NED | 35 |
| Kate Waugh | GBR | 26 |