Home Postcode finder QLD Rockville Rockville postcode QLD Rockville is a locality in Queensland covered by postcode 4350. Postcode 4350 State or territory Queensland (QLD) Region Toowoomba Region Add a free Rockville business listing More business listings in Rockville Businesses in RockvilleGarden City Dental Practice45 Holberton Street, Rockville QLD 4350, Australia · 0746340664Guardian self storage Toowoomba1 Mort St, Rockville QLD 4350, Australia · (07) 4633 1103Rockville State School3 Holberton St · 07 46592333 Common questionsWhat is the postcode for Rockville?Rockville, QLD has the postcode 4350.What state is Rockville in?Rockville 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 Rockville. Browse other postcodes in Queensland, or widen the search to every Australian postcode.