Home Postcode finder WA High Wycombe High Wycombe postcode WA High Wycombe is a locality in Western Australia covered by postcode 6057. Postcode 6057 State or territory Western Australia (WA) Region North West Suburbs Add a free High Wycombe business listing More business listings in High Wycombe Businesses in High WycombeAussie Ear PlugsHigh Wycombe WA, Australia · 428398528AussieEarPlugsHigh Wycombe Western Australia, Australia · 61 428 398 528Boab Tavern & Function Centre107 Dundas Street · (08) 9454 3566 Common questionsWhat is the postcode for High Wycombe?High Wycombe, WA has the postcode 6057.What state is High Wycombe in?High Wycombe is in Western Australia (WA).Does postcode 6057 cover more than one suburb?Yes. Postcode 6057 covers 2 localities, so the postcode alone does not identify High Wycombe. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.