Home Postcode finder QLD Watsonville Watsonville postcode QLD Watsonville is a locality in Queensland covered by postcode 4887. Postcode 4887 State or territory Queensland (QLD) Region North QLD Add a free Watsonville business listing Be the first listing in Watsonville Common questionsWhat is the postcode for Watsonville?Watsonville, QLD has the postcode 4887.What state is Watsonville in?Watsonville is in Queensland (QLD).Does postcode 4887 cover more than one suburb?Yes. Postcode 4887 covers 6 localities, so the postcode alone does not identify Watsonville. Browse other postcodes in Queensland, or widen the search to every Australian postcode.