With the new Dáil session beginning next week, the latest opinion poll indicates party support is relatively unchanged since the last comparable poll, taken in May.
Tomorrow's Behaviour and Attitudes Poll for The Sunday Times shows Fine Gael at 31%, down two percentage points.
Labour is unchanged on 14%, while Fianna Fáil support has also remained steady, on 16%.
Sinn Féin saw an increase of one percentage point to 18%, and remains the second most popular party.
Independents are also up by one percentage point, now standing at 19%, while the Green Party remains on 2%.
The poll also shows that satisfaction with the Government is 24%, which represents a drop of seven percentage points.
Support for party leaders shows Taoiseach Enda Kenny at 38%, down four points from May, while Tánaiste Eamon Gilmore is up two points to 33%.
Fianna Fáil leader Mícheál Martin drops seven points to 34%, Sinn Féin leader Gerry Adams is down three to 39% and Green Party leader Eamon Ryan is down two, at 27%.
Fieldwork for the poll was conducted between 4 September and 9 September with an eligible sample base of 923.
Asked whether they would or would not support a change in law to allow abortion where the life of a mother was at risk, 80% said they would, 14% said they would not, and 6% were undecided.