The Nenagh councillor saw off fellow hopefuls Martin Browne and Catherine Carey to secure his place on the party ticket.
Sinn Féin officials again ruled out a second candidate being put forward at a later date.
While it's believed Councillor Morris garnered a significant vote with around 200 members casting their ballots – there was none of the traditional valid polls or counts announced to confirm this with Sinn Féin simply declaring the winner. A spokesperson stated this was done so the focus could be on the party moving forward united.
Ahead of the vote – there were several speeches to rally the crowd with much criticism of the current and past governments – MEP Liadh Ní Riada was scathing in her opinion of the traditional political parties.
Councillor Morris pledged to take real action to address the problems facing ordinary families across Ireland.