Jack Anthony Han-Aitken (Korean: 한세용, Han Se-yong; born 23 September 1995) is a British and South Korean racing driver, currently competing in the IMSA SportsCar Championship for AXR and in the Deutsche Tourenwagen Masters for Emil Frey. Aitken competed in Formula One at the Sakhir Grand Prix in 2020.

Born and raised in London to a Scottish father and South Korean mother, Aitken began competitive kart racing aged seven. He made the transition to cars when he competed in the Intersteps Championship with Fortec Motorsport, with whom he then went on to race with in the Formula Renault BARC Winter Series, Formula Renault NEC and Formula Renault Eurocup.

After winning the Formula Renault Eurocup in 2015, Aitken was signed up for the Renault young driver academy, with which he remained until 2019. After competing in the GP3 Series in 2016 and 2017 he progressed to Formula 2 for 2018. He was Williams F1's reserve driver from 2020 until announcing his exit from the team in January 2023, and raced for the team at the 2020 Sakhir Grand Prix, replacing George Russell, who, in turn, replaced Lewis Hamilton at Mercedes for the event.