Home Postcode finder WA Gascoyne Junction Gascoyne Junction postcode WA Gascoyne Junction is a locality in Western Australia covered by postcode 6705. Postcode 6705 State or territory Western Australia (WA) Region North West Suburbs Add a free Gascoyne Junction business listing More business listings in Gascoyne Junction Businesses in Gascoyne JunctionGascoyne Junction Remote Community School36 Gregory St · 08 99430515 Common questionsWhat is the postcode for Gascoyne Junction?Gascoyne Junction, WA has the postcode 6705.What state is Gascoyne Junction in?Gascoyne Junction is in Western Australia (WA).Does postcode 6705 cover more than one suburb?Yes. Postcode 6705 covers 4 localities, so the postcode alone does not identify Gascoyne Junction. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.