Home Postcode finder WA Emu Flat Emu Flat postcode WA Emu Flat is a locality in Western Australia covered by postcode 6431. Postcode 6431 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Emu Flat business listing Be the first listing in Emu Flat Common questionsWhat is the postcode for Emu Flat?Emu Flat, WA has the postcode 6431.What state is Emu Flat in?Emu Flat is in Western Australia (WA).Does postcode 6431 cover more than one suburb?Yes. Postcode 6431 covers 13 localities, so the postcode alone does not identify Emu Flat. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.