Home Postcode finder SA Firle Firle postcode SA Firle is a locality in South Australia covered by postcode 5070. Postcode 5070 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Firle business listing More business listings in Firle Businesses in Firlemycar Tyre & Auto FirleFirle Plaza Enter off Margaret Street, (opposite Dunkley Avenue), Firle SA, Australia · (08) 8198 8211 Common questionsWhat is the postcode for Firle?Firle, SA has the postcode 5070.What state is Firle in?Firle is in South Australia (SA).Does postcode 5070 cover more than one suburb?Yes. Postcode 5070 covers 9 localities, so the postcode alone does not identify Firle. Browse other postcodes in South Australia, or widen the search to every Australian postcode.