Marcus John Armstrong (born 29 July 2000) is a New Zealand motor racing driver who competes in the IndyCar series, driving the No.

[1] While still karting, Armstrong graduated to single seaters in 2014 in the 2014–15 season of New Zealand Formula Ford Championship, ending seventh in the standings.

With four laps to go after a safety car restart, Armstrong had a mechanical failure whilst leading, and dropped to seventh at the flag.

Armstrong continued his collaboration with Prema, graduating to the FIA Formula 3 European Championship, alongside fellow Ferrari juniors Robert Shwartzman and Guanyu Zhou.

[45] Armstrong earned his ninth and last podium at the Red Bull Ring,[46] but a triple retirement in the final round at the Hockenheimring saw him drop from 3rd to 5th in the standings, scoring 260 points.

[57][58] Armstrong reunited with Prema Racing to contest the inaugural FIA Formula 3 Championship, partnering 2018 teammate Robert Shwartzman and Jehan Daruvala.

[63] In Race 2, Armstrong made a strong start to take fourth on the opening lap, and later passed Max Fewtrell for third.

[65] Armstrong had bad luck in Race 2, where he stalled from starting third, but made a brilliant charge to take sixth place in the end.

[81][82] Heading into the summer break and the final three rounds of the season, Armstrong sat fourth in the standings with 98 points, 36 off leader Shwartzman.

[90] Unfortunately, he was penalised twenty seconds for exceeding the minimum delta time during the race's first safety car period and dropped to 21st.

[105] On 28 November 2019, it was announced Armstrong would graduate to the FIA Formula 2 Championship with ART Grand Prix to partner F3 rival and Renault Sport Academy member Christian Lundgaard.

When Guanyu Zhou and Mick Schumacher ahead encountered problems of their own, Armstrong capitalised on the opportunity and rushed to second placed podium on his debut.

But just two laps later, Schumacher had a problem with his fire extinguisher and Armstrong re-took third place and claimed his second and last podium of the season.

Armstrong overtook more of his rivals and narrowly missed out on points, in ninth as he lost the final points-paying position to Zhou on the last lap.

On the final lap, he made a divebomb on Jehan Daruvala into the penultimate corner, sending him up to tenth and giving him reverse pole for the second sprint.

[135] In the feature race, whilst running tenth, he collided with Jüri Vips, the Estonian driver shoving him into the wall and capping off a miserable weekend for Armstrong.

[138] In the second sprint, Armstrong battled Bent Viscaal on lap 8 following a safety car restart, but misjudged his braking point due to cold tyres and slammed into the wall, ending his race.

[139] His feature race barely lasted half a lap, as he was sent into the wall due to being hit by Théo Pourchaire, which was ultimately caused by Ticktum.

In the feature race, he started on the hard tyres and it would pay off as he managed to overtake some rivals following a safety car restart to finish tenth, though he was later promoted to ninth due to Verschoor's disqualification.

[155] In Yas Marina, Armstrong finished sprint race 1 in tenth having started 11th, giving him reverse pole for the second time that year.

[159] Talking about the season in general, Armstrong admitted that “at times last year I felt like I was a bit blind," and that he didn't have the data to push for better results.

[160] Having driven in the post-season test with them,[161] Armstrong signed a deal to for Hitech Grand Prix during the 2022 season, partnering Jüri Vips.

[171] He made a decent start to jump Logan Sargeant off the line, and never looked back to take his first win of the year and second overall ahead of both Prema cars, despite having no radio for the entire race.

Again on the alternate strategy in the feature race, Armstrong would exit the pits in tenth, but fought back and claim seventh, passing Théo Pourchaire on the last lap.

[175][176] His feature race was uneventful, he ended seventh, giving his first double points finish in an F2 event and climbed to fourth in the standings.

[179] In the feature race, Armstrong passed Dennis Hauger at the start then later on Lawson during the lap 5 safety car restart.

[184][185] In the feature race on a drying track, some of his rivals opted to start on wets while the Kiwi was the leading driver on slicks.

[192] In Spa-Francorchamps, he qualified 12th and made a brilliant start in the sprint race, passing five cars to take seventh place on the opening lap, and would finish in that position.

[200] Armstrong had an uneventful Abu Dhabi weekend, he quietly achieved points in the feature race with ninth place.

[212] Despite entering the season as a rookie, he stated that he needed to "get on it straightaway", to experienced teammates Scott Dixon, Marcus Ericsson and Álex Palou.