Home Postcode finder WA Mungalup Mungalup postcode WA Mungalup is a locality in Western Australia covered by postcode 6225. Postcode 6225 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free Mungalup business listing Be the first listing in Mungalup Common questionsWhat is the postcode for Mungalup?Mungalup, WA has the postcode 6225.What state is Mungalup in?Mungalup is in Western Australia (WA).Does postcode 6225 cover more than one suburb?Yes. Postcode 6225 covers 18 localities, so the postcode alone does not identify Mungalup. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.