Home Postcode finder QLD Croydon Croydon postcode QLD Croydon is a locality in Queensland covered by postcode 4871. Postcode 4871 State or territory Queensland (QLD) Region North QLD Add a free Croydon business listing More business listings in Croydon Businesses in CroydonCroydon State SchoolBrown St · 07 47456197 Common questionsWhat is the postcode for Croydon?Croydon, QLD has the postcode 4871.What state is Croydon in?Croydon is in Queensland (QLD).Does postcode 4871 cover more than one suburb?Yes. Postcode 4871 covers 103 localities, so the postcode alone does not identify Croydon. Browse other postcodes in Queensland, or widen the search to every Australian postcode.