warren postcode nswst Home ›› Postcode Finder ›› NSWST ›› Warren Warren local listingsThe suburb of Warren is located in NSW and has a postcode of 2824. Free warren business listing! 1Warren Central School63 Chester St 02 684744382St Mary's SchoolLawson St 02 68474488 View more business listings in warren Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.