Sir William Anthony Bowater Russell (born 15 April 1965) is a British financier who served as the 692nd Lord Mayor of the City of London from 2019 to 2021.

[3][4] Sheriff of the City of London for 2016/17, Russell was then elected Lord Mayor on 1 October 2019, taking office on 9 November 2019.

[5][6] In view of the global disruption to public life brought about by the COVID-19 pandemic, Russell was re-elected, on 29 September 2020, as Lord Mayor of London to serve a second term for 2021,[7] the first Lord Mayor to serve more than one term since William Cubitt MP, who was re-elected in 1861.

[9] Russell represents Bread Street Ward as Alderman on the City of London Corporation since 2013.

[12] Russell was knighted in the 2022 New Year Honours for services to "financial innovation, culture and wellbeing in the City of London, particularly during COVID-19".