Home Postcodes by state VIC 3155 Postcode 3155 3155 is the postcode for Boronia, VIC. Localities with postcode 3155BoroniaVIC Postcode 3155 State or territory Victoria (VIC) Localities 1 Council area Knox Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3154 · Postcode 3156