Home Postcodes by state WA 6414 Postcode 6414 6414 is the postcode for Nangeenan, WA. Localities with postcode 6414NangeenanWA Postcode 6414 State or territory Western Australia (WA) Localities 1 Council area Merredin Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6413 · Postcode 6415