Home Postcode finder NSW Wellington Wellington postcode NSW Wellington is a locality in New South Wales covered by postcode 2820. Postcode 2820 State or territory New South Wales (NSW) Region NSW Country West Add a free Wellington business listing More business listings in Wellington Businesses in WellingtonSt Mary's Central SchoolPercy St · 02 68451822Wellington Christian School15 Gipps St · 02 68451999Wellington High School80-98 Whiteley St · 02 68452344 Common questionsWhat is the postcode for Wellington?Wellington, NSW has the postcode 2820.What state is Wellington in?Wellington is in New South Wales (NSW).Does postcode 2820 cover more than one suburb?Yes. Postcode 2820 covers 25 localities, so the postcode alone does not identify Wellington. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.