SINN Féin has surged 15 points clear of Fianna Fáil in the first opinion poll published since the general election.
The party has recorded a poll rating of 35pc, well ahead of Fianna Fáil on 20pc in a Behaviour and Attitudes (B&A) poll for the Sunday Times published on Saturday night.
Based on the outcome of the general election on February 8, Sinn Féin has surged 10 points while Fianna Fáil is down two points on its election result.
The poll, which was taken between February 17 and 25, shows that support for Fine Gael has also declined since the general election with the party on 18pc, down three points on its election result.
Support for the Green Party since the election has fallen one point to 6pc while Labour is at 3pc, down one point.
Solidarity-People Before Profit is unchanged from its election result on 3pc, while Aontu is on 1pc.
Independents and other parties record a rating of 10pc, down three points on the election result.
The poll also shows that Sinn Féin's Mary Lou McDonald is now the most popular party leader in the country with a satisfaction rating of 53pc - up 13 points on the last opinion poll in January.
Fianna Fáil leader Micheál Martin has a satisifaction rating of 31pc (-15), Fine Gael leader and caretaker Taoiseach Leo Varadkar is on 27pc (-8), while outgoing Labour leader Brendan Howlin is on 29pc (-9).
The last B&A poll for the Sunday Times was published on January 14 and was the first during the general election campaign.
It showed Fianna Fáil on 32pc, Fine Gael on 20pc and Sinn Féin on 19pc.