Home Postcode finder QLD Ipswich Ipswich postcode QLD Ipswich is a locality in Queensland covered by postcode 4305. Postcode 4305 State or territory Queensland (QLD) Region Western Suburbs Add a free Ipswich business listing More business listings in Ipswich Businesses in IpswichAffordable Hearing And Tinnitus Relief - Ipswich10 Churchill Street · (07) 3202 1727Andrea Plumb Therapies1/69 Glebe Road · (07) 3812 7777 B Indulged Skin & Cosmetic Clinic63 Blackstone Road · 07 3202 3797 Common questionsWhat is the postcode for Ipswich?Ipswich, QLD has the postcode 4305.What state is Ipswich in?Ipswich is in Queensland (QLD).Does postcode 4305 cover more than one suburb?Yes. Postcode 4305 covers 23 localities, so the postcode alone does not identify Ipswich. Browse other postcodes in Queensland, or widen the search to every Australian postcode.