Home Postcode finder WA Culham Culham postcode WA Culham is a locality in Western Australia covered by postcode 6566. Postcode 6566 State or territory Western Australia (WA) Region Wa Subs 4 Coast Add a free Culham business listing Be the first listing in Culham Common questionsWhat is the postcode for Culham?Culham, WA has the postcode 6566.What state is Culham in?Culham is in Western Australia (WA).Does postcode 6566 cover more than one suburb?Yes. Postcode 6566 covers 10 localities, so the postcode alone does not identify Culham. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.