Home Postcode finder QLD Smithfield Smithfield postcode QLD Smithfield is a locality in Queensland covered by postcode 4878. Postcode 4878 State or territory Queensland (QLD) Region North QLD Add a free Smithfield business listing More business listings in Smithfield Businesses in Smithfield Hair Boutique SmithfieldSmithfield Village Drive · 0472 547068Bupa Optical - Cairns SmithfieldShop 134 Smithfield Centre · 740381247Hamilton Concreting40 Thornborough Cct, Smithfield QLD 4878, Australia · 0400158297 Common questionsWhat is the postcode for Smithfield?Smithfield, QLD has the postcode 4878.What state is Smithfield in?Smithfield is in Queensland (QLD).Does postcode 4878 cover more than one suburb?Yes. Postcode 4878 covers 6 localities, so the postcode alone does not identify Smithfield. Browse other postcodes in Queensland, or widen the search to every Australian postcode.