Sinn Féin has topped the latest opinion poll, gaining four points to move up to 26%.
The Millward Brown survey for tomorrow's Sunday Independent questioned 1,000 people over the past 10 days.
It shows Independents also making gains, they increased their support by two points to stand at 23%.
Support for both Coalition parties is down, with Fine Gael dropping three points to 22% and Labour down two from 9% to 7%.
Fianna Fáil has also seen a drop in support, down one to 20%.