Home Postcodes by state VIC 3581 Postcode 3581 3581 is the postcode for Lake Charm, VIC. Localities with postcode 3581Lake CharmVIC Postcode 3581 State or territory Victoria (VIC) Localities 1 Council area Gannawarra Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3580 · Postcode 3583