Alexander Dunne (/ˈdʌn/; born 11 November 2005) is an Irish racing driver who competes in the FIA Formula 2 Championship for Rodin Motorsport.

Born and raised in County Offaly, Dunne began competitive kart racing aged eight, winning several national titles before progressing to junior formulae in 2021. After debuting in Spanish and ADAC Formula 4, he won the 2022 F4 British Championship with Hitech and finished runner-up to Andrea Kimi Antonelli in Italian F4. He then progressed to GB3 with Hitech, finishing runner-up to Callum Voisin in his rookie season. After a year in FIA Formula 3, Dunne graduated to FIA Formula 2 in 2025 with Rodin, winning multiple races in his rookie campaign.

A member of the McLaren Driver Development Programme from 2024-2025, Dunne made his free practice debut in Formula One at the 2025 Austrian Grand Prix with McLaren. He served as a reserve driver for McLaren in Formula E for the 2024–25 season, prior to the team's withdrawal from the series. He was released from the team prior to the 2025 Singapore Grand Prix.

Dunne began karting at the age of eight, taking a number of victories in local competitions. He would then progress to national competitions in 2015, winning the Motorsport Ireland 'IRL' and '0' Plates and also taking home the Ironside Trophy. That year he would also make his first competitive appearance outside of Ireland, racing in the Super 1 National Championship in the United Kingdom. Following two years of competing across Ireland and Great Britain, Dunne started racing in mainland Europe in 2018. He remained in European karting until 2020, with his highlight being winning the WSK Champions Cup in the OK-Junior class in 2019.

Dunne made his single-seater racing debut in 2021, racing for Pinnacle Motorsport in the F4 Spanish Championship. His season started out in positive fashion, as he scored a pole position on debut in Spa-Francorchamps. Despite having fallen back to fifth owing to a poor start, finished third in his first ever race. Following the round, Dunne would only score twice in the next two rounds that he competed in. Following the Portimão round, Dunne and the team parted ways, leaving the Irishman 16th in the overall standings with 30 points at the end of the season.

It was announced in September of the same year that Dunne would be joining US Racing as part of their ADAC F4 Championship line-up. At his first round at the Hockenheimring, the Irish driver had an impressive debut, picking up two second places. His next appearance at the track yielded a pair of pole positions, although that round brought a retirement and two fourth places. He finished eighth in the standings with 76 points, beating a number of full-time competitors.

At the beginning of 2022, Dunne competed in the F4 UAE Championship for Hitech GP in preparation for his European campaign. He would achieve his first ever win in car racing during the third at the Dubai Autodrome through unusual circumstances, as, during a red flag, all drivers bar Dunne parked up in the pitlane instead of the start/finish straight, giving them all a five-second penalty. Despite being overtaken by Andrea Kimi Antonelli at the restart, the Irishman remained closely behind the Italian to inherit the victory. After a third place rostrum during the third Dubai round, Dunne won another race during the third race of the final round at the Yas Marina Circuit, he would follow this up with a third place during the last race. Dunne finished sixth in the standings, having scored two wins, four podiums and 168 points.

For his European season, Dunne stayed with US Racing to compete in the Italian F4 Championship, partnering Kacper Sztuka, Marcus Amand, Pedro Perino and Nikhil Bohra. In the first round of the campaign at Imola, Dunne amassed a triple of podiums, having overtaken PHM Racing's Nikita Bedrin in the dying embers of Race 1 to pick up second place and having stormed to the front in Race 2, he held off a fast-charging Rafael Câmara until the checkered flag for the win. Despite losing control of the car in Race 3 after hitting a sausage kerb on lap one, the Irishman was able to recover to third. However, despite a podium at Misano and another one at Spa-Francorchamps, he would be shuffled out of the top two in the championship, being overtaken by Prema drivers Rafael Câmara and Andrea Kimi Antonelli. Dunne returned to winning ways at the Red Bull Ring, taking two victories and an additional podium, thus narrowing the gap to his two competitors. However, despite three second-placed finishes in the remaining two events, Dunne would have to settle for second in the standings, with Antonelli having attained an unassailable lead during the season finale.