Home Postcodes by state VIC 3788 Postcode 3788 3788 is the postcode for Olinda, VIC. Localities with postcode 3788OlindaVIC Postcode 3788 State or territory Victoria (VIC) Localities 1 Council area Yarra Ranges Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3787 · Postcode 3789