Home Postcodes by state QLD Frankfield Frankfield postcode QLD Frankfield is a locality in Queensland covered by postcode 4721. Postcode 4721 (every locality with postcode 4721) State or territory Queensland (QLD) Region Central QLD Council area Isaac Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Add a free Frankfield business listing Be the first listing in Frankfield Also in postcode 4721ArgyllQLD 4721ClermontQLD 4721Gemini MountainsQLD 4721KilcumminQLD 4721PashaQLD 4721Theresa CreekQLD 4721WolfangQLD 4721 Common questionsWhat is the postcode for Frankfield?Frankfield, QLD has the postcode 4721.What state is Frankfield in?Frankfield is in Queensland (QLD).What council is Frankfield in?Frankfield is in the Isaac local government area.Does postcode 4721 cover more than one suburb?Yes. Postcode 4721 covers 8 localities, so the postcode alone does not identify Frankfield. Browse other postcodes in Queensland, or widen the search to every Australian postcode.