Niall Ó Donnghaile is an Irish former Sinn Féin politician who served as a senator for the Administrative Panel from 2016 to 2024. He was the Leader of Sinn Féin in the Seanad from June 2020 to January 2024. He previously served as Lord Mayor of Belfast from 2011 to 2012 and a councillor on Belfast City Council from 2011 to 2016.
