Iain John Grant Napier (born 10 April 1949) is a Scottish businessman, who was non-executive chairman of Imperial Tobacco, a British multinational tobacco company, from 2007 to 2013.
Napier was also non-executive chairman of John Menzies plc until May 2016 and chairman of McBride plc until 30 Jun 2016.
He is a director of Molson Coors since July 2008.
He is a director of William Grant & Sons since 2009.He is from Rothesay, Bute.