Home Postcode finder WA Munglinup Munglinup postcode WA Munglinup is a locality in Western Australia covered by postcode 6450. Postcode 6450 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Munglinup business listing Be the first listing in Munglinup Common questionsWhat is the postcode for Munglinup?Munglinup, WA has the postcode 6450.What state is Munglinup in?Munglinup is in Western Australia (WA).Does postcode 6450 cover more than one suburb?Yes. Postcode 6450 covers 23 localities, so the postcode alone does not identify Munglinup. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.