Home Postcode finder WA Midvale Midvale postcode WA Midvale is a locality in Western Australia covered by postcode 6056. Postcode 6056 State or territory Western Australia (WA) Region North West Suburbs Add a free Midvale business listing More business listings in Midvale Businesses in MidvaleAquasports Marine331 Great Eastern Highway · 08-9250-3339Autoplus WA3 Artello Bay Road · (08) 9274 7311Billabong Pools10 · 08 9274 7924 Common questionsWhat is the postcode for Midvale?Midvale, WA has the postcode 6056.What state is Midvale in?Midvale is in Western Australia (WA).Does postcode 6056 cover more than one suburb?Yes. Postcode 6056 covers 17 localities, so the postcode alone does not identify Midvale. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.