Home Postcodes by state WA 6509 Postcode 6509 6509 is the postcode for 4 localities in WA: Glentromie, New Norcia, Waddington and Yarawindah. Localities with postcode 6509GlentromieWANew NorciaWAWaddingtonWAYarawindahWA Postcode 6509 State or territory Western Australia (WA) Localities 4 Council area Victoria Plains Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6507 · Postcode 6510