McNulty, who ran on a platform of empowerment, equality, college efficiency and accommodation, won on the second count with 49.8 per cent of the vote.
Ó Faoilleacháin won with 59.4 per cent of the vote on the first count, beating competitor Patrick Higgins.
Ní Lochlainn stormed ahead of her competition, winning on the first count with 60.3 per cent of votes.
Rowley won on the fourth count with 50.6 per cent, with Caolán Maher coming in second place.
The TCDSU elections have seen an 18 per cent decrease in voter turnout compared to last year, with only 3,894 votes cast.
Baker is the second independently-elected editor of The University Times, and ran on a platform of accessibility and improving the skills of current staff.
Byrne won on the first count with 54.2 per cent of the vote in a tight race with Emmet Broaders.
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Dramatic leads for McNulty, Ní Lochlainn and O'Faoilléacháin predicted by The University Times.
In the last hustings of the campaign period, candidates in the TCDSU elections made their last plea for votes in Trinity Hall