Home Postcode finder SA Louth Bay Louth Bay postcode SA Louth Bay is a locality in South Australia covered by postcode 5607. Postcode 5607 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Louth Bay business listing Be the first listing in Louth Bay Common questionsWhat is the postcode for Louth Bay?Louth Bay, SA has the postcode 5607.What state is Louth Bay in?Louth Bay is in South Australia (SA).Does postcode 5607 cover more than one suburb?Yes. Postcode 5607 covers 50 localities, so the postcode alone does not identify Louth Bay. Browse other postcodes in South Australia, or widen the search to every Australian postcode.