Home Postcode finder QLD Millmerran Millmerran postcode QLD Millmerran is a locality in Queensland covered by postcode 4357. Postcode 4357 State or territory Queensland (QLD) Region Toowoomba Region Add a free Millmerran business listing More business listings in Millmerran Businesses in MillmerranMillmerran State School19 Simmons St · 07 46953333St Joseph's School25 Walpole St · 07 46951349 Common questionsWhat is the postcode for Millmerran?Millmerran, QLD has the postcode 4357.What state is Millmerran in?Millmerran is in Queensland (QLD).Does postcode 4357 cover more than one suburb?Yes. Postcode 4357 covers 26 localities, so the postcode alone does not identify Millmerran. Browse other postcodes in Queensland, or widen the search to every Australian postcode.