Home Postcode finder SA Galga Galga postcode SA Galga is a locality in South Australia covered by postcode 5308. Postcode 5308 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Galga business listing Be the first listing in Galga Common questionsWhat is the postcode for Galga?Galga, SA has the postcode 5308.What state is Galga in?Galga is in South Australia (SA).Does postcode 5308 cover more than one suburb?Yes. Postcode 5308 covers 6 localities, so the postcode alone does not identify Galga. Browse other postcodes in South Australia, or widen the search to every Australian postcode.