Home Postcode finder QLD Sunnyside Sunnyside postcode QLD Sunnyside is a locality in Queensland covered by postcode 4737. Postcode 4737 State or territory Queensland (QLD) Region Central QLD Add a free Sunnyside business listing Be the first listing in Sunnyside Common questionsWhat is the postcode for Sunnyside?Sunnyside, QLD has the postcode 4737.What state is Sunnyside in?Sunnyside is in Queensland (QLD).Does postcode 4737 cover more than one suburb?Yes. Postcode 4737 covers 8 localities, so the postcode alone does not identify Sunnyside. Browse other postcodes in Queensland, or widen the search to every Australian postcode.