Home Postcode finder WA South Kalgoorlie South Kalgoorlie postcode WA South Kalgoorlie is a locality in Western Australia covered by postcode 6430. Postcode 6430 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free South Kalgoorlie business listing More business listings in South Kalgoorlie Businesses in South KalgoorlieEastern Goldfields Education Support CentreLot 3385 Boomerang Crescent · 08 90213691Kali Counselling Services23A Rhodes St, South Kalgoorlie WA 6430, Australia · 0420836161 Common questionsWhat is the postcode for South Kalgoorlie?South Kalgoorlie, WA has the postcode 6430.What state is South Kalgoorlie in?South Kalgoorlie is in Western Australia (WA).Does postcode 6430 cover more than one suburb?Yes. Postcode 6430 covers 14 localities, so the postcode alone does not identify South Kalgoorlie. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.