Home Postcode finder QLD Fairfield Gardens Fairfield Gardens postcode QLD Fairfield Gardens is a locality in Queensland covered by postcode 4103. Postcode 4103 State or territory Queensland (QLD) Region Heathwood Add a free Fairfield Gardens business listing Be the first listing in Fairfield Gardens Common questionsWhat is the postcode for Fairfield Gardens?Fairfield Gardens, QLD has the postcode 4103.What state is Fairfield Gardens in?Fairfield Gardens is in Queensland (QLD).Does postcode 4103 cover more than one suburb?Yes. Postcode 4103 covers 3 localities, so the postcode alone does not identify Fairfield Gardens. Browse other postcodes in Queensland, or widen the search to every Australian postcode.