The 2019 Australian Grand Prix was a Formula One motor race that was held on 17 March 2019 in Melbourne, Victoria. The race was contested at the Albert Park Circuit and was the first round of the 2019 FIA Formula One World Championship. The race marked the 84th race in the combined history of the Australian Grand Prix – which dates back to the 100 Miles Road Race of 1928 – the 24th time the event was held at the Albert Park circuit and the 35th time the Australian Grand Prix had been a part of the Formula One World Championship. This was the last Grand Prix held on this configuration of the Albert Park Circuit that had been in use since 1996 with the 2020 and 2021 events being cancelled and the 2022 event being run on an adjusted layout.

The 2019 FIA Formula One World Championship was the motor racing championship for Formula One cars which marked the 70th running of the Formula One World Championship. It is recognised by the governing body of international motorsport, the Fédération Internationale de l'Automobile (FIA), as the highest class of competition for open-wheel racing cars. Starting in March and ending in December, the championship was contested over twenty-one Grands Prix. Drivers competed for the title of World Drivers' Champion, and teams for the title of World Constructors' Champion. The 2019 championship also saw the running of the 1000th World Championship race, the 2019 Chinese Grand Prix.