Home Postcode finder SA Blackwood Blackwood postcode SA Blackwood is a locality in South Australia covered by postcode 5051. Postcode 5051 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Blackwood business listing More business listings in Blackwood Businesses in BlackwoodB3 Coffee231 Main Road · 08 7221 1686Blackwood Osteopathyunit 3/26 Coromandel Parade, Blackwood SA, Australia · 08 8278 8838Hills And Valley Real Estate Pty Ltd1 200 Main road · 08 8278 4222 Common questionsWhat is the postcode for Blackwood?Blackwood, SA has the postcode 5051.What state is Blackwood in?Blackwood is in South Australia (SA).Does postcode 5051 cover more than one suburb?Yes. Postcode 5051 covers 4 localities, so the postcode alone does not identify Blackwood. Browse other postcodes in South Australia, or widen the search to every Australian postcode.