Home Postcode finder NSW Blackheath Blackheath postcode NSW Blackheath is a locality in New South Wales covered by postcode 2785. Postcode 2785 State or territory New South Wales (NSW) Region Nepean Add a free Blackheath business listing More business listings in Blackheath Businesses in BlackheathBlackheath Public SchoolLeichhardt St · 02 47878253Blue Mountains Christian School60 Thirroul Ave · 02 47878645Colliers Crystals & Gifts23-25 Govetts Leap Road, Blackheath NSW 2785, Australia · (02) 4787 7403 Common questionsWhat is the postcode for Blackheath?Blackheath, NSW has the postcode 2785.What state is Blackheath in?Blackheath is in New South Wales (NSW).Does postcode 2785 cover more than one suburb?Yes. Postcode 2785 covers 2 localities, so the postcode alone does not identify Blackheath. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.