Home Postcode finder WA Lamington Lamington postcode WA Lamington is a locality in Western Australia covered by postcode 6430. Postcode 6430 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Lamington business listing Be the first listing in Lamington Common questionsWhat is the postcode for Lamington?Lamington, WA has the postcode 6430.What state is Lamington in?Lamington is in Western Australia (WA).Does postcode 6430 cover more than one suburb?Yes. Postcode 6430 covers 14 localities, so the postcode alone does not identify Lamington. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.