smithfield postcode qldga Home ›› Postcode Finder ›› QLDGA ›› Smithfield Smithfield local listingsThe suburb of Smithfield is located in QLD and has a postcode of 4878. Free smithfield business listing! 1Smithfield State High SchoolO'Brien Rd 07 405843332Holy Cross Primary SchoolReed Rd 07 405769203Bupa Optical - Cairns SmithfieldShop 134 Smithfield Centre 740381247 View more business listings in smithfield Search and find other Postcodes in Queensland or widen the search to Postcodes in Australia.