Home Postcode finder QLD Cedar Grove Cedar Grove postcode QLD Cedar Grove is a locality in Queensland covered by postcode 4285. Postcode 4285 State or territory Queensland (QLD) Region Heathwood Add a free Cedar Grove business listing Be the first listing in Cedar Grove Common questionsWhat is the postcode for Cedar Grove?Cedar Grove, QLD has the postcode 4285.What state is Cedar Grove in?Cedar Grove is in Queensland (QLD).Does postcode 4285 cover more than one suburb?Yes. Postcode 4285 covers 33 localities, so the postcode alone does not identify Cedar Grove. Browse other postcodes in Queensland, or widen the search to every Australian postcode.