cairns postcode qldga Home ›› Postcode Finder ›› QLDGA ›› Cairns Cairns local listingsThe suburb of Cairns is located in QLD and has a postcode of 4870. Free cairns business listing! 1Cairns State High School156-194 Sheridan St 07 405030332Cairns School of Distance EducationHoare St 07 408091113St Monica's College177 Abbott St 07 40512744 View more business listings in cairns Search and find other Postcodes in Queensland or widen the search to Postcodes in Australia.