Home Postcode finder QLD Coominya Coominya postcode QLD Coominya is a locality in Queensland covered by postcode 4311. Postcode 4311 State or territory Queensland (QLD) Region Western Suburbs Add a free Coominya business listing More business listings in Coominya Businesses in CoominyaCoominya State SchoolCnr Cornhill & Main St · 07 54265111 Common questionsWhat is the postcode for Coominya?Coominya, QLD has the postcode 4311.What state is Coominya in?Coominya is in Queensland (QLD).Does postcode 4311 cover more than one suburb?Yes. Postcode 4311 covers 17 localities, so the postcode alone does not identify Coominya. Browse other postcodes in Queensland, or widen the search to every Australian postcode.