An exit poll has revealed a three-way tie between Fine Gael, Sinn Féin and Fianna Fáil.
All three parties are in a dead heat with 22% of votes.
It indicates Green Party first preference support stands at 8%; Labour at 4%; the Social Democrats at 3%; Solidarity People Before Profit at 3%; and Independents at 11%.
Over 5,000 people were questioned throughout the day.
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The poll has a margin of error of + or - 1.3%.