Home Postcode finder WA Rocklea Rocklea postcode WA Rocklea is a locality in Western Australia covered by postcode 6751. Postcode 6751 State or territory Western Australia (WA) Region North West Suburbs Add a free Rocklea business listing Be the first listing in Rocklea Common questionsWhat is the postcode for Rocklea?Rocklea, WA has the postcode 6751.What state is Rocklea in?Rocklea is in Western Australia (WA).Does postcode 6751 cover more than one suburb?Yes. Postcode 6751 covers 10 localities, so the postcode alone does not identify Rocklea. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.