Dominic Hannigan is an Irish former Labour Party politician who served as a Teachta Dála (TD) for the Meath East constituency from 2011 to 2016. He was a Senator for the Labour Panel from 2007 to 2011.

A by-election was held in the Dáil Éireann Meath constituency in Ireland on Friday, 11 March 2005. It followed the resignation of Fine Gael Teachta Dála (TD) John Bruton on 31 October 2004 to take up his new position as European Union Ambassador to the United States.