Home Postcodes by state VIC 3934 Postcode 3934 3934 is the postcode for Mount Martha, VIC. Localities with postcode 3934Mount MarthaVIC Postcode 3934 State or territory Victoria (VIC) Localities 1 Council area Mornington Peninsula Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3933 · Postcode 3936