Home Postcode finder QLD South Toowoomba South Toowoomba postcode QLD South Toowoomba is a locality in Queensland covered by postcode 4350. Postcode 4350 State or territory Queensland (QLD) Region Toowoomba Region Add a free South Toowoomba business listing More business listings in South Toowoomba Businesses in South ToowoombaGroutPro60B Stephen St, South Toowoomba QLD 4350, Australia · 1800 822 459Toowoomba South State School158 James St · 07 46318222 Common questionsWhat is the postcode for South Toowoomba?South Toowoomba, QLD has the postcode 4350.What state is South Toowoomba in?South Toowoomba 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 South Toowoomba. Browse other postcodes in Queensland, or widen the search to every Australian postcode.