Home Postcode finder QLD Holland Park East Holland Park East postcode QLD Holland Park East is a locality in Queensland covered by postcode 4121. Postcode 4121 State or territory Queensland (QLD) Region South Subs Add a free Holland Park East business listing More business listings in Holland Park East Businesses in Holland Park EastAffordable Hearing And Tinnitus Relief - Holland Park East105 Seville Road · (07) 3349 4588 Common questionsWhat is the postcode for Holland Park East?Holland Park East, QLD has the postcode 4121.What state is Holland Park East in?Holland Park East is in Queensland (QLD).Does postcode 4121 cover more than one suburb?Yes. Postcode 4121 covers 5 localities, so the postcode alone does not identify Holland Park East. Browse other postcodes in Queensland, or widen the search to every Australian postcode.