Home Postcodes by state NSW 2780 Postcode 2780 2780 is the postcode for 3 localities in NSW: Katoomba, Leura and Medlow Bath. Localities with postcode 2780KatoombaNSWLeuraNSWMedlow BathNSW Postcode 2780 State or territory New South Wales (NSW) Localities 3 Council area Blue Mountains Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2779 · Postcode 2782