silkstone postcode qldga Home ›› Postcode Finder ›› QLDGA ›› Silkstone Silkstone local listingsThe suburb of Silkstone is located in QLD and has a postcode of 4304. Free silkstone business listing! 1Silkstone State SchoolMolloy St 07 328120012Silkstone Baptist Community Kindergarten169 Blackstone Road View more business listings in silkstone Search and find other Postcodes in Queensland or widen the search to Postcodes in Australia.