Home Postcodes by state 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 Council area Upper Gascoyne Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. 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 Also in postcode 6705East Lyons RiverWA 6705Gascoyne RiverWA 6705West Lyons RiverWA 6705 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).What council is Gascoyne Junction in?Gascoyne Junction is in the Upper Gascoyne local government area.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.