Home Postcode finder QLD Isisford Isisford postcode QLD Isisford is a locality in Queensland covered by postcode 4731. Postcode 4731 State or territory Queensland (QLD) Region Central QLD Add a free Isisford business listing More business listings in Isisford Businesses in IsisfordIsisford State SchoolSt Helena St · 07 46588186 Common questionsWhat is the postcode for Isisford?Isisford, QLD has the postcode 4731.What state is Isisford in?Isisford is in Queensland (QLD).Does postcode 4731 cover more than one suburb?No. Postcode 4731 covers Isisford only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in Queensland, or widen the search to every Australian postcode.