Home Postcode finder WA Millbridge Millbridge postcode WA Millbridge is a locality in Western Australia covered by postcode 6232. Postcode 6232 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Millbridge business listing Be the first listing in Millbridge Common questionsWhat is the postcode for Millbridge?Millbridge, WA has the postcode 6232.What state is Millbridge in?Millbridge is in Western Australia (WA).Does postcode 6232 cover more than one suburb?Yes. Postcode 6232 covers 2 localities, so the postcode alone does not identify Millbridge. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.