Home Postcode finder QLD Grantham Grantham postcode QLD Grantham is a locality in Queensland covered by postcode 4347. Postcode 4347 State or territory Queensland (QLD) Region Western Suburbs Add a free Grantham business listing More business listings in Grantham Businesses in GranthamGrantham State School15 Victor St · 07 54661259Ma Ma Creek State School803 Gatton Clifton Highway · 07 54627271 Common questionsWhat is the postcode for Grantham?Grantham, QLD has the postcode 4347.What state is Grantham in?Grantham is in Queensland (QLD).Does postcode 4347 cover more than one suburb?Yes. Postcode 4347 covers 5 localities, so the postcode alone does not identify Grantham. Browse other postcodes in Queensland, or widen the search to every Australian postcode.