Home Postcode finder VIC Deddick Valley Deddick Valley postcode VIC Deddick Valley is a locality in Victoria covered by postcode 3888. Postcode 3888 State or territory Victoria (VIC) Region Vic Far Country Add a free Deddick Valley business listing Be the first listing in Deddick Valley Common questionsWhat is the postcode for Deddick Valley?Deddick Valley, VIC has the postcode 3888.What state is Deddick Valley in?Deddick Valley is in Victoria (VIC).Does postcode 3888 cover more than one suburb?Yes. Postcode 3888 covers 22 localities, so the postcode alone does not identify Deddick Valley. Browse other postcodes in Victoria, or widen the search to every Australian postcode.