Home Postcode finder WA Gibson Gibson postcode WA Gibson is a locality in Western Australia covered by postcode 6448. Postcode 6448 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Gibson business listing More business listings in Gibson Businesses in GibsonWongutha Christian Aboriginal SchoolGibson East Rd · 08 90754011 Common questionsWhat is the postcode for Gibson?Gibson, WA has the postcode 6448.What state is Gibson in?Gibson is in Western Australia (WA).Does postcode 6448 cover more than one suburb?No. Postcode 6448 covers Gibson only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.