millfield postcode nswst Home ›› Postcode Finder ›› NSWST ›› Millfield Millfield local listingsThe suburb of Millfield is located in NSW and has a postcode of 2325. Free millfield business listing! 1Millfield Public SchoolWollombi Rd 02 499813312Sweetmans Timber Pty Ltd339 Wollombi Road 0249981224 View more business listings in millfield Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.