Home Postcode finder WA Collanilling Collanilling postcode WA Collanilling is a locality in Western Australia covered by postcode 6315. Postcode 6315 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Collanilling business listing Be the first listing in Collanilling Common questionsWhat is the postcode for Collanilling?Collanilling, WA has the postcode 6315.What state is Collanilling in?Collanilling is in Western Australia (WA).Does postcode 6315 cover more than one suburb?Yes. Postcode 6315 covers 12 localities, so the postcode alone does not identify Collanilling. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.