The club was founded in 2018 by the merger of Killester United and Donnycarney. As Killester United, the club qualified for the
FAI Cup in 2006, 2008, 2012, 2015, 2016 and 2017, reaching the quarter-finals of the cup in
2006 and
2015. Killester Donnycarney were runners-up in the
FAI Intermediate Cup in 2019–20, losing to
St. Mochta's in the final. They have qualified for the
FAI Cup on several occasions, reaching the last sixteen in
2021. ==Ground==