Home Postcode finder SA Sebastopol Sebastopol postcode SA Sebastopol is a locality in South Australia covered by postcode 5280. Postcode 5280 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Sebastopol business listing Be the first listing in Sebastopol Common questionsWhat is the postcode for Sebastopol?Sebastopol, SA has the postcode 5280.What state is Sebastopol in?Sebastopol is in South Australia (SA).Does postcode 5280 cover more than one suburb?Yes. Postcode 5280 covers 16 localities, so the postcode alone does not identify Sebastopol. Browse other postcodes in South Australia, or widen the search to every Australian postcode.