Home Postcode finder QLD Garfield Garfield postcode QLD Garfield is a locality in Queensland covered by postcode 4728. Postcode 4728 State or territory Queensland (QLD) Region Central QLD Add a free Garfield business listing Be the first listing in Garfield Common questionsWhat is the postcode for Garfield?Garfield, QLD has the postcode 4728.What state is Garfield in?Garfield is in Queensland (QLD).Does postcode 4728 cover more than one suburb?Yes. Postcode 4728 covers 4 localities, so the postcode alone does not identify Garfield. Browse other postcodes in Queensland, or widen the search to every Australian postcode.