Home Postcode finder SA Sherlock Sherlock postcode SA Sherlock is a locality in South Australia covered by postcode 5301. Postcode 5301 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Sherlock business listing Be the first listing in Sherlock Common questionsWhat is the postcode for Sherlock?Sherlock, SA has the postcode 5301.What state is Sherlock in?Sherlock is in South Australia (SA).Does postcode 5301 cover more than one suburb?Yes. Postcode 5301 covers 9 localities, so the postcode alone does not identify Sherlock. Browse other postcodes in South Australia, or widen the search to every Australian postcode.