Home Postcode finder QLD Marlborough Marlborough postcode QLD Marlborough is a locality in Queensland covered by postcode 4705. Postcode 4705 State or territory Queensland (QLD) Region Central QLD Add a free Marlborough business listing More business listings in Marlborough Businesses in MarlboroughMarlborough State SchoolMagog St · 07 49356166 Common questionsWhat is the postcode for Marlborough?Marlborough, QLD has the postcode 4705.What state is Marlborough in?Marlborough is in Queensland (QLD).Does postcode 4705 cover more than one suburb?Yes. Postcode 4705 covers 5 localities, so the postcode alone does not identify Marlborough. Browse other postcodes in Queensland, or widen the search to every Australian postcode.