Home Postcode finder QLD Hamilton Island Hamilton Island postcode QLD Hamilton Island is a locality in Queensland covered by postcode 4803. Postcode 4803 State or territory Queensland (QLD) Region Central QLD Add a free Hamilton Island business listing More business listings in Hamilton Island Businesses in Hamilton IslandHamilton Island Holiday Apartments1 Banksia Ct · 1800 135 539Hamilton Island State School07 49468327Whitsunday Apartments Hamilton Island14 Resort Drive · (07) 4969 9999 Common questionsWhat is the postcode for Hamilton Island?Hamilton Island, QLD has the postcode 4803.What state is Hamilton Island in?Hamilton Island is in Queensland (QLD).Does postcode 4803 cover more than one suburb?No. Postcode 4803 covers Hamilton Island only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in Queensland, or widen the search to every Australian postcode.