Home Postcodes by state VIC 3594 Postcode 3594 3594 is the postcode for Nyah, VIC. Localities with postcode 3594NyahVIC Postcode 3594 State or territory Victoria (VIC) Localities 1 Council area Swan Hill Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3591 · Postcode 3595