The Sunday Business Post/Red C poll shows Leo Varadkar's party up 5 points to 32 per cent support.
Fine Gael are up 5 points in this survey, their highest result in a Red C poll since December 2015.
Fianna Fáil are static on 26 per cent, with Sinn Féin dropping one to 15 points.
9 per cent of people would vote Independent, down 1 - while Labour and the Green Party remain unchanged on 6 and 4 per cent respectively.
The Independent Alliance are down 1 to 3 per cent - the same mark as Solidarity - People Before Profit.
The Social Democrats are down 1 per cent to 2 points, while Renua are on zero down one per cent.
