Home Postcodes by state WA 6465 Postcode 6465 6465 is the postcode for Manmanning, WA. Localities with postcode 6465ManmanningWA Postcode 6465 State or territory Western Australia (WA) Localities 1 Council area Dowerin Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6463 · Postcode 6466