Home Postcode finder WA Belmont Belmont postcode WA Belmont is a locality in Western Australia covered by postcode 6104. Postcode 6104 State or territory Western Australia (WA) Region Wa Subs 4 Coast Add a free Belmont business listing More business listings in Belmont Businesses in BelmontAir Roofing77 Belgravia Street · 08 9361 6008Averna HomesLevel 1 · (08) 9373 3999B & S Printing Co3 Longfellow Court · (08) 9377 2988 Common questionsWhat is the postcode for Belmont?Belmont, WA has the postcode 6104.What state is Belmont in?Belmont is in Western Australia (WA).Does postcode 6104 cover more than one suburb?Yes. Postcode 6104 covers 3 localities, so the postcode alone does not identify Belmont. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.