Home Postcodes by state QLD 4426 Postcode 4426 4426 is the postcode for 3 localities in QLD: Jackson, Jackson North and Jackson South. Localities with postcode 4426JacksonQLDJackson NorthQLDJackson SouthQLD Postcode 4426 State or territory Queensland (QLD) Localities 3 Council area Maranoa Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4425 · Postcode 4427