Moto3 2019 Mugello
| # | Piloto | Equipe | Moto | 4529 | Pneus | |
|---|---|---|---|---|---|---|
| 3 | Kevin Zannoni | TM Official Team | TM Racing | TM Racing | Dunlop | |
| 5 |  Jaume Masia | Platinum Bay Real Estate | KTM RC 250 GP | KTM M32 | Dunlop | |
| 6 |  Ryusei Yamanaka |  Estrella Galicia 0,0 | Honda NSF250RW | Honda MR03GP | Dunlop | |
| 7 | Dennis Foggia | Team VR46 | KTM RC 250 GP | KTM M32 | Dunlop | |
| 11 | Sergio Garcia | Estrella Galicia 0,0 | Honda NSF250RW | Honda MR03GP | Dunlop | |
| 12 |  Filip Salac |  Prustel GP | KTM RC 250 GP | KTM M32 | Dunlop | |
| 13 | Celestino Vietti Ramus | Team VR46 | KTM RC 250 GP | KTM M32 | Dunlop | |
| 14 | Tony Arbolino | Snipers Team | Honda NSF250RW | Honda MR03GP | Dunlop | |
| 16 | Andrea Migno | Platinum Bay Real Estate | KTM RC 250 GP | KTM M32 | Dunlop | |
| 17 |  John McPhee |  Petronas Raceline Malaysia Team Honda | Honda NSF250RW | Honda MR03GP | Dunlop | |
| 19 |  Gabriel Rodrigo | Kommerling Gresini Moto3 | Honda NSF250RW | Honda MR03GP | Dunlop | |
| 21 | Alonso Lopez | Estrella Galicia 0,0 | Honda NSF250RW | Honda MR03GP | Dunlop | |
| 22 | Kazuki Masaki | BOE Skull Rider Mugen Race | KTM RC 250 GP | KTM M32 | Dunlop | |
| 23 | Niccolò Antonelli | SIC58 Squadra Corse | Honda NSF250RW | Honda MR03GP | Dunlop | |
| 24 | Tatsuki Suzuki | SIC58 Squadra Corse | Honda NSF250RW | Honda MR03GP | Dunlop | |
| 25 | Raul Fernandez | Sama Qatar Angel Nieto Team | KTM RC 250 GP | KTM M32 | Dunlop | |
| 27 | Kaito Toba | Idemitsu Honda Team Asia | Honda NSF250RW | Honda MR03GP | Dunlop | |
| 31 | Gerry Salim | Idemitsu Honda Team Asia | Honda NSF250RW | Honda MR03GP | Dunlop | |
| 40 |  Darryn Binder |  CIP | KTM RC 250 GP | KTM M32 | Dunlop | |
| 42 | Marcos Ramírez | Leopard Racing | Honda NSF250RW | Honda MR03GP | Dunlop | |
| 44 | Aron Canet | Sterilgarda Max Racing Team | KTM RC 250 GP | KTM M32 | Dunlop | |
| 48 | Lorenzo Porta | Leopard Racing | Honda NSF250RW | Honda MR03GP | Dunlop | |
| 54 | Riccardo Rossi | Kommerling Gresini Moto3 | Honda NSF250RW | Honda MR03GP | Dunlop | |
| 55 | Romano Fenati | Snipers Team | Honda NSF250RW | Honda MR03GP | Dunlop | |
| 61 |  Can Öncü |  Red Bull KTM Factory Racing (MXGP) | KTM RC 250 GP | KTM M32 | Dunlop | |
| 69 | Tom Booth-Amos | CIP | KTM RC 250 GP | KTM M32 | Dunlop | |
| 71 | Ayumu Sasaki | Petronas Raceline Malaysia Team Honda | Honda NSF250RW | Honda MR03GP | Dunlop | |
| 75 | Albert Arenas | Sama Qatar Angel Nieto Team | KTM RC 250 GP | KTM M32 | Dunlop | |
| 76 |  Makar Yurchenko | BOE Skull Rider Mugen Race | KTM RC 250 GP | KTM M32 | Dunlop | |
| 77 | Vicente Perez | Reale Avintia Arizona 77 | KTM RC 250 GP | KTM M32 | Dunlop | |
| 79 | Ai Ogura | Idemitsu Honda Team Asia | Honda NSF250RW | Honda MR03GP | Dunlop | |
| 84 | Jakub Kornfeil | Prustel GP | KTM RC 250 GP | KTM M32 | Dunlop |
