Sir David Thomas Rowell Lewis (born 1 November 1947 in Hong Kong) was the Lord Mayor of London for 2007 and 2008.
In 1999 Norton Rose was the first UK law firm to win a Queen's Award for Exports.
Lewis has served as a NED of Standard Life, and as a member of the Isle of Man Financial Supervision Commission.
His public and charitable service includes: Governor of the Dragon School Oxford (1987–2017)(chairman 2003–8); churchwarden of St Margaret's Church Lothbury (2001–13); Almoner/Governor of Christ's Hospital (2004–10)(school chairman 2010); chairman Oxford Univ Law Development Council (2003–6); trustee Oxford Univ Law Foundation (1997–2007); member Oxford Univ Chancellor's court of benefactors (1997–2010) and of VC's circle of benefactors since 2010; member of Council of Oxford Brookes Univ (1995–2003), of Lampeter Univ, and of Swansea Univ (2014–16); Chancellor of City Univ (2007–8); Chairman of HM Commissiomers of City of London (Lord Lieutenant) 2007–8; president Lord Mayor's Appeal 2007-8 for Wellbeing of Women and ORBIS, and trustee of both charities; president of St Edward's School Society (1995); co-founded the annual Sheriffs' Award for Bravery at the Old Bailey 2007; co-founded the annual Lord Mayor's Big Curry Lunch 2008 for Army Benevolent Fund; magistrate in City of London and in Carmarthenshire 2001–11; liveryman of City of London Solicitors Company (Master 2009–10), of Fletchers Company, of Welsh Livery Guild, and Hon Liveryman of Security Professionals Company; president of City of London Law Society (2009–10); City of London Law Soc company law committee (1982–97); Law Soc Legal Practice Course committee (2009–12); Governor/ Chairman of The Hon The Irish Society (2009–12).
Lewis endowed in perpetuity at Jesus College Oxford (a) a Law Fellowship in 2010, (b) the Sir Peter North Fund for bursaries, and (c) the Francis Jones annual prize for the best book or article on any era of Welsh history in 2017.