Home Postcode finder QLD Newmarket Newmarket postcode QLD Newmarket is a locality in Queensland covered by postcode 4051. Postcode 4051 State or territory Queensland (QLD) Region Northgate Add a free Newmarket business listing More business listings in Newmarket Businesses in NewmarketLois D'arcy19 Gracemere Street · 0419 702 165Newmarket Family Dental76 Enoggera Road, Newmarket QLD, Australia · 07 3356 3400Newmarket State School15 Banks St · 07 35527222 Common questionsWhat is the postcode for Newmarket?Newmarket, QLD has the postcode 4051.What state is Newmarket in?Newmarket is in Queensland (QLD).Does postcode 4051 cover more than one suburb?Yes. Postcode 4051 covers 6 localities, so the postcode alone does not identify Newmarket. Browse other postcodes in Queensland, or widen the search to every Australian postcode.