Home Postcodes by state WA 6361 Postcode 6361 6361 is the postcode for 2 localities in WA: Harrismith and Tincurrin. Localities with postcode 6361HarrismithWATincurrinWA Postcode 6361 State or territory Western Australia (WA) Localities 2 Council area Wickepin Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6359 · Postcode 6363