Home Postcode finder QLD Drillham Drillham postcode QLD Drillham is a locality in Queensland covered by postcode 4424. Postcode 4424 State or territory Queensland (QLD) Region Toowoomba Region Add a free Drillham business listing More business listings in Drillham Businesses in DrillhamDrillham State SchoolJardine St · 07 46276289 Common questionsWhat is the postcode for Drillham?Drillham, QLD has the postcode 4424.What state is Drillham in?Drillham is in Queensland (QLD).Does postcode 4424 cover more than one suburb?Yes. Postcode 4424 covers 3 localities, so the postcode alone does not identify Drillham. Browse other postcodes in Queensland, or widen the search to every Australian postcode.