wallacia postcode nswst Home ›› Postcode Finder ›› NSWST ›› Wallacia Wallacia local listingsThe suburb of Wallacia is located in NSW and has a postcode of 2745. Free wallacia business listing! 1Wallacia Public School171 Mulgoa Rd 02 47738433 View more business listings in wallacia Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.