The 2021 Firestone Grand Prix of Monterey was an IndyCar motor race held on September 19, 2021 at the WeatherTech Raceway Laguna Seca.

[2][3] The event, which was held on the weekend of September 17-19, 2021 at the WeatherTech Raceway Laguna Seca in Monterey, California, returned to the series after its absence in the 2020 season due to the COVID-19 pandemic.

After his win at the Grand Prix of Portland, Álex Palou retook the championship lead with a 25-point advantage from Pato O'Ward, who only finished 14th and subsequently dropped to second place in the standings.

[1] The session saw numerous incidents happen, such as Colton Herta going off-track past the Corkscrew and Hélio Castroneves making contact with the tire barriers in Turn 2, though no major damage was caused.

[1] Colton Herta took pole position with a time of 01:10.7994, ahead of Andretti teammate Alexander Rossi and Penske driver Will Power, who finished second and third respectively.

However, while Herta managed to continue without problems, Rossi spun into the gravel and stalled, causing a caution as his car was restarted – he would later finish 25th, two laps behind.

As Sato's car stalled, it rolled backwards towards Scott Dixon, who attempted an evasive maneuver by driving off-track, but to no avail, as he suffered damage to his right sidepod and undertray.

[2][12] Honda clinched their fourth consecutive Manufacturer's Cup at Laguna Seca, as the top five finishers featured four Honda-powered cars.