Home Postcode finder VIC Mid Valley Mid Valley postcode VIC Mid Valley is a locality in Victoria covered by postcode 3840. Postcode 3840 State or territory Victoria (VIC) Region Vic Country Add a free Mid Valley business listing Be the first listing in Mid Valley Common questionsWhat is the postcode for Mid Valley?Mid Valley, VIC has the postcode 3840.What state is Mid Valley in?Mid Valley is in Victoria (VIC).Does postcode 3840 cover more than one suburb?Yes. Postcode 3840 covers 11 localities, so the postcode alone does not identify Mid Valley. Browse other postcodes in Victoria, or widen the search to every Australian postcode.