Rishi Sunak est né le 12 mai 1980 à Hampshire, Angleterre, Royaume-Uni. Il est marié avec Akshata Murty Sunak depuis le 30 août 2009. Lui et Akshata Murty Sunak ont deux enfants.
Although he announced his decision to run for prime minister of the United Kingdom on 8 July 2022, the day after Boris Johnson's resignation, he had already registered the internet domain for his leadership bid's website on 23 December 2021.