marlborough postcode qld Home ›› Postcode Finder ›› QLD ›› Marlborough Marlborough local listingsThe suburb of Marlborough is located in QLD and has a postcode of 4705. Free marlborough business listing! 1Marlborough State SchoolMagog St 07 49356166 View more business listings in marlborough Search and find other Postcodes in Queensland or widen the search to Postcodes in Australia.