Home Postcode finder SA Linwood Linwood postcode SA Linwood is a locality in South Australia covered by postcode 5410. Postcode 5410 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Linwood business listing Be the first listing in Linwood Common questionsWhat is the postcode for Linwood?Linwood, SA has the postcode 5410.What state is Linwood in?Linwood is in South Australia (SA).Does postcode 5410 cover more than one suburb?Yes. Postcode 5410 covers 2 localities, so the postcode alone does not identify Linwood. Browse other postcodes in South Australia, or widen the search to every Australian postcode.