wellington postcode nswst Home ›› Postcode Finder ›› NSWST ›› Wellington Wellington local listingsThe suburb of Wellington is located in NSW and has a postcode of 2820. Free wellington business listing! 1St Mary's Central SchoolPercy St 02 684518222Wellington Christian School15 Gipps St 02 684519993Wellington High School80-98 Whiteley St 02 68452344 View more business listings in wellington Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.