Arran is one of the nine electoral wards of North Ayrshire Council.
Re-established in 2022, the ward elects one councillor using the single transferable vote electoral system and covers an area with a population of 4,649 people.
The Arran ward was first created in 1974 by the Formation Electoral Arrangements for Cunninghame District Council from the previous Corrie and Brodick, Lamlash, Whiting Bay, Southend, Shedog and Lochranza electoral divisions of Bute County Council.
(Scotland) Act 1994, the boundaries proposed by the second review became the Formation Electoral Arrangements for the newly created North Ayrshire Council – a unitary authority for the area previously under Cunninghame District Council.
As a result, the 2019 Reviews of Electoral Arrangements saw the re-establishment of a ward for Arran with the same boundaries as before.