Home Postcodes by state WA Cooladar Hill Cooladar Hill postcode WA Cooladar Hill is a locality in Western Australia covered by postcode 6638. Postcode 6638 State or territory Western Australia (WA) Region North West Suburbs Council area Mount Magnet Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Add a free Cooladar Hill business listing Be the first listing in Cooladar Hill Also in postcode 6638Daggar HillsWA 6638Mount MagnetWA 6638PaynesvilleWA 6638 Common questionsWhat is the postcode for Cooladar Hill?Cooladar Hill, WA has the postcode 6638.What state is Cooladar Hill in?Cooladar Hill is in Western Australia (WA).What council is Cooladar Hill in?Cooladar Hill is in the Mount Magnet local government area.Does postcode 6638 cover more than one suburb?Yes. Postcode 6638 covers 4 localities, so the postcode alone does not identify Cooladar Hill. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.