Home Postcode finder WA Somerville Somerville postcode WA Somerville 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 Somerville business listing More business listings in Somerville Businesses in SomervilleMarketing Academy Group Pty Ltd5 Heston Ct · +610427255542 Common questionsWhat is the postcode for Somerville?Somerville, WA has the postcode 6430.What state is Somerville in?Somerville 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 Somerville. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.