Thomas David Simpson (born 16 February 1959) is a Democratic Unionist Party (DUP) politician in Northern Ireland, who was the Member of Parliament (MP) for Upper Bann from 2005 to 2019. On 6 November 2019 Simpson announced that he would not be standing for re-election in the 2019 general election. Simpson had previously been a Member of the Northern Ireland Assembly (MLA) for Upper Bann, from 2003 to 2010.