Home Postcode finder QLD Harlaxton Harlaxton postcode QLD Harlaxton is a locality in Queensland covered by postcode 4350. Postcode 4350 State or territory Queensland (QLD) Region Toowoomba Region Add a free Harlaxton business listing More business listings in Harlaxton Businesses in HarlaxtonHarlaxton State School112 Ruthven St · 07 46325500King Arthur Handyman & Pest Control Services75 Ruthven St, Harlaxton QLD 4350, Australia · 0417 739 897 Common questionsWhat is the postcode for Harlaxton?Harlaxton, QLD has the postcode 4350.What state is Harlaxton in?Harlaxton 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 Harlaxton. Browse other postcodes in Queensland, or widen the search to every Australian postcode.