Home Postcode finder WA Benjinup Benjinup postcode WA Benjinup is a locality in Western Australia covered by postcode 6255. Postcode 6255 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free Benjinup business listing Be the first listing in Benjinup Common questionsWhat is the postcode for Benjinup?Benjinup, WA has the postcode 6255.What state is Benjinup in?Benjinup is in Western Australia (WA).Does postcode 6255 cover more than one suburb?Yes. Postcode 6255 covers 7 localities, so the postcode alone does not identify Benjinup. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.