Home Postcodes by state WA 6315 Postcode 6315 6315 is the postcode for 12 localities in WA: Arthur River, Ballaying, Cancanning, Collanilling, Dongolocking, Gundaring and 6 more. Localities with postcode 6315Arthur RiverWABallayingWACancanningWACollanillingWADongolockingWAGundaringWAJaloranWALime LakeWAMindingWAPiessevilleWAWaginWAWedgecarrupWA Postcode 6315 State or territory Western Australia (WA) Localities 12 Council area West Arthur; Wagin; Dumbleyung Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6313 · Postcode 6316