Home Postcode finder WA Karloo Karloo postcode WA Karloo is a locality in Western Australia covered by postcode 6530. Postcode 6530 State or territory Western Australia (WA) Region Wa Subs 4 Coast Add a free Karloo business listing Be the first listing in Karloo Common questionsWhat is the postcode for Karloo?Karloo, WA has the postcode 6530.What state is Karloo in?Karloo is in Western Australia (WA).Does postcode 6530 cover more than one suburb?Yes. Postcode 6530 covers 22 localities, so the postcode alone does not identify Karloo. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.