Early tallies are showing Fianna Fáil at 32 per cent of first-preference votes, followed by independents and others at 25.68 per cent, Sinn Féin at 25.5 per cent, and Fine Gael at 16.6 per cent.
With 150 of the county's 246 boxes opened, tallies showed Deputy McConalogue at 24 per cent of first preference votes. That includes all Inishowen boxes, as well as boxes from Letterkenny, Donegal and Glenties.
McConalogue had a strong showing in his native Inishowen, with tallies showing him collecting 7,792 first-preference votes.
With 79% of the boxes in County Sligo opened, Fianna Fáil is also showing big gains. Marc MacSharry is at 18% and Eamon Scanlon 16%.
Fine Gael's John Perry is at 11%, two points behind his party colleague Tony McLoughlin who is currently at 13%.
Sinn Féin's Chris McManus is on 11%.