Home Postcodes by state QLD Redgate Redgate postcode QLD Redgate is a locality in Queensland covered by postcode 4605. Postcode 4605 State or territory Queensland (QLD) Region Toowoomba Region Add a free Redgate business listing Be the first listing in Redgate Common questionsWhat is the postcode for Redgate?Redgate, QLD has the postcode 4605.What state is Redgate in?Redgate is in Queensland (QLD).Does postcode 4605 cover more than one suburb?Yes. Postcode 4605 covers 21 localities, so the postcode alone does not identify Redgate. Browse other postcodes in Queensland, or widen the search to every Australian postcode.