Home Postcode finder WA Burnside Burnside postcode WA Burnside is a locality in Western Australia covered by postcode 6285. Postcode 6285 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free Burnside business listing Be the first listing in Burnside Common questionsWhat is the postcode for Burnside?Burnside, WA has the postcode 6285.What state is Burnside in?Burnside is in Western Australia (WA).Does postcode 6285 cover more than one suburb?Yes. Postcode 6285 covers 9 localities, so the postcode alone does not identify Burnside. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.