Fine Gael continues to top the poll, though Sinn Féin is closing the gap.
The latest Red C poll suggests that Sinn Féin's support is higher than its ever been in Ireland since this series of polls began in 2003.
According to the
Business Post/Red C poll, the party led by Mary Lou McDonald has seen its support rise by three points to 30%.
McDonald celebrated this news on her Twitter page by saying: "Big challenges and hard work ahead but for today happy birthday to us."
Fine Gael remains at the top of the poll on 33%, but that figure has fallen by four points since September’s survey.
Fianna Fáil is up to 12%, an increase of one point, while the Green Party are on 5%, down one point since September.
Independents remain on 8%, while the Social Democrats are up one point to 4%.
Labour are also unchanged on 3%, while support for Solidarity-People Before Profit has drawn level with them after rising by one point since the last survey.
The online poll of 1,000 people is believed to have a margin of error of plus or minus 3%.
