Home Postcode finder WA Glentromie Glentromie postcode WA Glentromie is a locality in Western Australia covered by postcode 6509. Postcode 6509 State or territory Western Australia (WA) Region Wa Subs 4 Coast Add a free Glentromie business listing Be the first listing in Glentromie Common questionsWhat is the postcode for Glentromie?Glentromie, WA has the postcode 6509.What state is Glentromie in?Glentromie is in Western Australia (WA).Does postcode 6509 cover more than one suburb?Yes. Postcode 6509 covers 4 localities, so the postcode alone does not identify Glentromie. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.