Fianna Fáil has narrowed the gap with Fine Gael to seven points, according to the latest Behaviour and Attitudes opinion poll for the Sunday Times.
The poll suggests that Micheál Martin’s party has made a four-point gain to 25%, while Fine Gael is down two points to 32%.
The figures compare to the last poll taken in July before the Dáil went into recess.
The survey shows Sinn Féin is also down two points to 20% while Labour is up two to 5%.
The Green Party is up one point to 3% and Solidarity/PBP are up two points to stand at 3%.
The Social Democrats are down one point to zero, Renua is also on zero, while the Independent Alliance is unchanged on 4% and independents and smaller parties are down two points to 8%.
Government satisfaction is down five points to 43%, while Taoiseach Leo Varadkar remains the most popular party leader on a satisfaction rating of 53% although this is down three points since the last poll.
Satisfaction with all other party leaders is also down with Micheál Martin down one point to 48%, Labour Party leader Brendan Howlin down two to 41%, and Sinn Féin president Mary Lou McDonald down three points on a satisfaction rating of 50%.