MotoGP 2021 GP de Aragón
| # | Piloto | Equipe | Moto | 4529 | Pneus | |
|---|---|---|---|---|---|---|
| 5 |  Johann Zarco |  Alma Pramac Racing | Ducati Desmosedici GP21 | Ducati | Michelin | |
| 9 | Danilo Petrucci | Tech 3 | KTM RC16 | KTM | Michelin | |
| 10 | Luca Marini | Reale Avintia Racing | Ducati Desmosedici GP19 | Ducati | Michelin | |
| 12 | Maverick Viñales | Aprilia Racing Team Gresini | Aprilia RS-GP | Aprilia | Michelin | |
| 20 | Fabio Quartararo |  Movistar Yamaha MotoGP | Yamaha YZR-M1 | Yamaha | Michelin | |
| 21 | Franco Morbidelli |  Drive M7 SIC Racing Team | Yamaha YZR-M1 | Yamaha | Michelin | |
| 23 | Enea Bastianini | Reale Avintia Racing | Ducati Desmosedici GP19 | Ducati | Michelin | |
| 27 | Iker Lecuona | Tech 3 | KTM RC16 | KTM | Michelin | |
| 30 | Takaaki Nakagami |  LCR Honda | Honda RC213V | Honda | Michelin | |
| 33 |  Brad Binder |  Red Bull KTM Factory Racing (MXGP) | KTM RC16 | KTM | Michelin | |
| 35 |  Cal Crutchlow | Movistar Yamaha MotoGP | Yamaha YZR-M1 | Yamaha | Michelin | |
| 36 | Joan Mir | Team Suzuki Ecstar MotoGP | Suzuki GSX-RR | Suzuki | Michelin | |
| 41 | Aleix Espargaro | Aprilia Racing Team Gresini | Aprilia RS-GP | Aprilia | Michelin | |
| 42 | Alex Rins | Team Suzuki Ecstar MotoGP | Suzuki GSX-RR | Suzuki | Michelin | |
| 43 |  Jack Miller | Ducati Team | Ducati Desmosedici GP21 | Ducati | Michelin | |
| 44 | Pol Espargaro | Repsol Honda Team | Honda RC213V | Honda | Michelin | |
| 46 | Valentino Rossi | Drive M7 SIC Racing Team | Yamaha YZR-M1 | Yamaha | Michelin | |
| 63 | Francesco Bagnaia | Ducati Team | Ducati Desmosedici GP21 | Ducati | Michelin | |
| 73 | Alex Marquez | LCR Honda | Honda RC213V | Honda | Michelin | |
| 88 |  Miguel Oliveira | Red Bull KTM Factory Racing (MXGP) | KTM RC16 | KTM | Michelin | |
| 89 | Jorge Martin | Alma Pramac Racing | Ducati Desmosedici GP21 | Ducati | Michelin | |
| 93 | Marc Marquez | Repsol Honda Team | Honda RC213V | Honda | Michelin | |
| 96 | Jake Dixon | Drive M7 SIC Racing Team | Yamaha YZR-M1 | Yamaha | Michelin |
