Home Postcode finder WA Wyndham Wyndham postcode WA Wyndham is a locality in Western Australia covered by postcode 6740. Postcode 6740 State or territory Western Australia (WA) Region North West Suburbs Add a free Wyndham business listing More business listings in Wyndham Businesses in WyndhamSt Joseph's School77 St Peters Way · 08 91611021Wyndham District High SchoolLot 1735 Coverley St · 08 91611063 Common questionsWhat is the postcode for Wyndham?Wyndham, WA has the postcode 6740.What state is Wyndham in?Wyndham is in Western Australia (WA).Does postcode 6740 cover more than one suburb?Yes. Postcode 6740 covers 6 localities, so the postcode alone does not identify Wyndham. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.