thornleigh postcode nswst Home ›› Postcode Finder ›› NSWST ›› Thornleigh Thornleigh local listingsThe suburb of Thornleigh is located in NSW and has a postcode of 2120. Free thornleigh business listing! 1Normanhurst West Public School4-10 Dartford Rd 02 948442522Thornleigh West Public School18 Giblett Ave 02 948442423North Shore Hi-Tech10 Railway Parade (02) 9484 5611 View more business listings in thornleigh Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.