Home Postcode finder QLD Fassifern Valley Fassifern Valley postcode QLD Fassifern Valley is a locality in Queensland covered by postcode 4309. Postcode 4309 State or territory Queensland (QLD) Region Western Suburbs Add a free Fassifern Valley business listing Be the first listing in Fassifern Valley Common questionsWhat is the postcode for Fassifern Valley?Fassifern Valley, QLD has the postcode 4309.What state is Fassifern Valley in?Fassifern Valley is in Queensland (QLD).Does postcode 4309 cover more than one suburb?Yes. Postcode 4309 covers 17 localities, so the postcode alone does not identify Fassifern Valley. Browse other postcodes in Queensland, or widen the search to every Australian postcode.