Home Postcode finder SA Nelshaby Nelshaby postcode SA Nelshaby is a locality in South Australia covered by postcode 5540. Postcode 5540 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Nelshaby business listing Be the first listing in Nelshaby Common questionsWhat is the postcode for Nelshaby?Nelshaby, SA has the postcode 5540.What state is Nelshaby in?Nelshaby is in South Australia (SA).Does postcode 5540 cover more than one suburb?Yes. Postcode 5540 covers 14 localities, so the postcode alone does not identify Nelshaby. Browse other postcodes in South Australia, or widen the search to every Australian postcode.