Home Postcode finder VIC Horsham West Horsham West postcode VIC Horsham West is a locality in Victoria covered by postcode 3400. Postcode 3400 State or territory Victoria (VIC) Region Vic Far Country Add a free Horsham West business listing Be the first listing in Horsham West Common questionsWhat is the postcode for Horsham West?Horsham West, VIC has the postcode 3400.What state is Horsham West in?Horsham West is in Victoria (VIC).Does postcode 3400 cover more than one suburb?Yes. Postcode 3400 covers 2 localities, so the postcode alone does not identify Horsham West. Browse other postcodes in Victoria, or widen the search to every Australian postcode.