Home Postcode finder QLD Esk Esk postcode QLD Esk is a locality in Queensland covered by postcode 4312. Postcode 4312 State or territory Queensland (QLD) Region Western Suburbs Add a free Esk business listing More business listings in Esk Businesses in EskEsk State SchoolEast St · 07 54244111 Common questionsWhat is the postcode for Esk?Esk, QLD has the postcode 4312.What state is Esk in?Esk is in Queensland (QLD).Does postcode 4312 cover more than one suburb?Yes. Postcode 4312 covers 13 localities, so the postcode alone does not identify Esk. Browse other postcodes in Queensland, or widen the search to every Australian postcode.