The 2017–18 Cymru Alliance (known as the Huws Gray Cymru Alliance for sponsorship reasons) is the 28th season of the top football league in North Wales. Mirroring its South Wales counterpart the Welsh Football League Division One, the 16-team division forms half of the second tier of the Welsh football league system and falls one level below the nationwide Welsh Premier League. The season began 12 August 2017 and is scheduled to conclude on 31 March 2018.
On 27 July 2017, Rhayader Town withdrew from the league, citing that their players were unwilling to commit to the extra travelling involved with promotion.[4] There was no replacement team - the league continued with 15 teams for this season only, playing 28 games each.