For the London World Championships, the IAAF had appointed, as the races would be all in one day, the presence of 12 judges.
In the table below are indicated the distribution of roles in the three different races, remembering that in the 50km will simultaneously compete both male and female.
| 2017 World Athletic Championships, Judges Duty Record |
| Amended Aug. 4.2017 | | | | | |
| | Name | Country | Judges in 50km | Judges 20km W | Judges 20km M |
| | | | | | |
| Judge | Frederic Bianchi | SUI | 6 | 1 | 1 |
| Judge | Noel Carmody | GBR | 1 | 2 | |
| Judge | Jean-Pierre Dahm | FRA | 2 | | 2 |
| Judge | Maryanne Daniel | USA | | 3 | 3 |
| Judge | Jordi Estruch | ESP | 3 | 4 | |
| Judge | Anne Froberg | FIN | 4 | | 4 |
| Judge | Joaquim Graca | POR | | 5 | 5 |
| Judge | Khoo Chong Beng | MAS | 5 | | 6 |
| Judge | Daniel Michaud | CAN | | 7 | 7 |
| Judge | Rolf Muller | GER | 7 | 6 | |
| Judge | Pierce O'Callaghan | IRL | 8 | | |
| Judge | Candido Velez | PUR | | 8 | 8 |
| Recorder | Dolores Rojas | ESP | | | |
| Assistant 1 | Peter Marlow | GBR | | | |
| Assistant 2 | Ian Richards | GBR | | | |
| Chief | Steve Taylor | GBR | CJ | CJ | CJ
|