Home Postcode finder WA Prince Regent River Prince Regent River postcode WA Prince Regent River 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 Prince Regent River business listing Be the first listing in Prince Regent River Common questionsWhat is the postcode for Prince Regent River?Prince Regent River, WA has the postcode 6740.What state is Prince Regent River in?Prince Regent River 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 Prince Regent River. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.