In the league itself, the two teams finished level on points before Wexford Youths retained the title after a play-off.
[8] Wexford Youths also completed a treble, having already won both the FAI Women's Cup and WNL Shield.
UCD Waves played in Group A along with the southern teams, Cork City, Kilkenny United and Wexford Youths.
The other four northern teams, Castlebar Celtic, Galway W.F.C., Peamount United and Shelbourne Ladies played in Group B.
In a sign of things to come, Castlebar Celtic failed to field a team against Shelbourne Ladies in their group game.
[14][15] In the final, played at Ferrycarrig Park on 30 March 2016, Wexford Youths defeated Shelbourne Ladies 1–0 with Edel Kennedy scoring the winner.
It used the traditional round-robin format with each team playing two full rounds of games home and away.
Youths had a second chance to clinch the title when they played Shelbourne Ladies at Tolka Park on Wednesday, 11 May.
Before the play-off Shelbourne Ladies defeated UCD Waves in the WNL Cup final on Sunday, 15 May.