2019 Moto3 season
The 2019 Moto3 World Championship was a part of the 71st F.I.M. Grand Prix motorcycle racing season.
This class and Moto2 adopted the qualifying format used by MotoGP for the season, in which the riders that placed 15th or lower on combined times in the third free practice session would be admitted to qualifying 1, then the four fastest riders from that session would join the fastest 14 riders in qualifying 2.
Teams and riders
Team changes
- Marinelli Snipers Team expanded to two bikes again after the team's withdrawal from Moto2. They also rebranded themselves as Team O for the 2019 season.
- Max Biaggi's team, Max Racing Team, made its World Championship debut after he signed a partnership deal with Peter Öttl's race team, Südmetal Schedl GP Racing.
Rider changes
- Philipp Öttl moved up to Moto2 with Red Bull KTM Tech 3.
- Both Fabio Di Giannantonio and Jorge Martín moved up to Moto2, joining Speed Up Racing and Red Bull KTM Ajo respectively.
- Raúl Fernández will make his full season debut with Ángel Nieto Team, replacing Andrea Migno who moved to Bester Capital Dubai.
- Filip Salač will make his full season debut with Redox PrüstelGP as a teammate of Jakub Kornfeil, replacing Marco Bezzecchi who moved up to Moto2 with Red Bull KTM Tech 3.
- Celestino Vietti will make his full season debut with Sky Racing Team VR46, replacing Nicolò Bulega who moved up to Moto2 with the same team.
- Makar Yurchenko returned to Moto3 with BOE Skull Rider Mugen Race.
- John McPhee left CIP Green Power to join Petronas Sprinta Racing, replacing Adam Norrodin who moved to the CEV Moto2 European Championship with the same team.
- Marcos Ramírez left Bester Capital Dubai to join Leopard Racing, replacing Enea Bastianini who moved up to Moto2 with Italtrans Racing Team.
- Sergio García will make his full season debut with Estrella Galicia 0,0, replacing Arón Canet who moved to Max Racing Team.
- Ai Ogura will make his full season debut with Honda Team Asia, replacing Nakarin Atiratphuvapat.
- Gabriel Rodrigo left RBA Racing Team and joined Gresini Racing alongside rookie Riccardo Rossi.
- Romano Fenati returned to Moto3 with Team O after one season in Moto2 after his contract with Forward Racing was terminated following the controversial incident at the 2018 San Marino Grand Prix with Stefano Manzi.
- Can Öncü will make his full season debut with Red Bull KTM Ajo, replacing Darryn Binder who moved to CIP Green Power. Öncü will be allowed to race despite being below the minimum age of 16 as he received a special dispensation by Dorna after winning the Red Bull MotoGP Rookies Cup in 2018.
- Tom Booth-Amos will make his full season debut with CIP Green Power.
In-season changes
- Ryusei Yamanaka replaced Sergio García for the first race due to age restriction.
- Vicente Pérez was dropped due to poor results and replaced by Stefano Nepa from the Dutch TT onwards.
Calendar
VisitQatar Grand Prix
Red Bull Grand Prix of The Americas
Gran Premio Red Bull de España
SHARK Helmets 
Gran Premi 
Motul TT 
HJC Helmets Motorrad Grand Prix Deutschland
Monster Energy Grand Prix České republiky
myWorld Motorrad Grand Prix von Österreich
GoPro 
Gran Premio Michelin de Aragón
PTT Thailand Grand Prix
Motul Grand Prix of Japan
Pramac Generac 
Shell Malaysia 
Gran Premio Motul de la Comunitat ValencianaResults and standings
Grands Prix
Riders' standings
;Scoring systemPoints are awarded to the top fifteen finishers. A rider has to finish the race to earn points.
| Position | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 9th | 10th | 11th | 12th | 13th | 14th | 15th |
| Points | 25 | 20 | 16 | 13 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
Manufacturers' standingsTeams' standings |