Home Postcode finder QLD Gowrie Mountain Gowrie Mountain postcode QLD Gowrie Mountain is a locality in Queensland covered by postcode 4350. Postcode 4350 State or territory Queensland (QLD) Region Toowoomba Region Add a free Gowrie Mountain business listing Be the first listing in Gowrie Mountain Common questionsWhat is the postcode for Gowrie Mountain?Gowrie Mountain, QLD has the postcode 4350.What state is Gowrie Mountain in?Gowrie Mountain is in Queensland (QLD).Does postcode 4350 cover more than one suburb?Yes. Postcode 4350 covers 43 localities, so the postcode alone does not identify Gowrie Mountain. Browse other postcodes in Queensland, or widen the search to every Australian postcode.