Home Postcode finder WA Highgate Highgate postcode WA Highgate is a locality in Western Australia covered by postcode 6003. Postcode 6003 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Highgate business listing More business listings in Highgate Businesses in HighgateHighgate Primary School147 Lincoln St · 08 93284201Pro Pest Control Perth2/310 Lord Street, Highgate WA 6003, Australia · 08 7744 5555Sacred Heart Primary School40 Mary St · 08 93288817 Common questionsWhat is the postcode for Highgate?Highgate, WA has the postcode 6003.What state is Highgate in?Highgate is in Western Australia (WA).Does postcode 6003 cover more than one suburb?Yes. Postcode 6003 covers 2 localities, so the postcode alone does not identify Highgate. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.