Home Postcode finder QLD Cannon Valley Cannon Valley postcode QLD Cannon Valley is a locality in Queensland covered by postcode 4800. Postcode 4800 State or territory Queensland (QLD) Region Central QLD Add a free Cannon Valley business listing Be the first listing in Cannon Valley Common questionsWhat is the postcode for Cannon Valley?Cannon Valley, QLD has the postcode 4800.What state is Cannon Valley in?Cannon Valley is in Queensland (QLD).Does postcode 4800 cover more than one suburb?Yes. Postcode 4800 covers 38 localities, so the postcode alone does not identify Cannon Valley. Browse other postcodes in Queensland, or widen the search to every Australian postcode.