Garnock Valley is one of the nine wards used to elect members of the North Ayrshire council. Created in 2007 as Kilbirnie and Beith and covering the small towns of Beith and Kilbirnie, it elected three Councillors. It was unaffected by a national boundary review prior to the 2017 local elections, but after the introduction of the Islands (Scotland) Act 2018, North Ayrshire's wards were re-organised for the 2022 election: Dalry and Barmill were added from the previous Dalry and West Kilbride ward (the remaining territory going to the North Coast ward) along with two extra councillors, and the name was amended to Garnock Valley to reflect its wider scope.