Home Postcode finder WA Donnybrook Donnybrook postcode WA Donnybrook is a locality in Western Australia covered by postcode 6239. Postcode 6239 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free Donnybrook business listing More business listings in Donnybrook Businesses in DonnybrookA&R Engineering 19 Ramsey Terrace · 08 9731 1400A&R Machinery59 South Western Highway · 0897310370A&R Machinery59 South Western Highway · 08 9731 1000 Common questionsWhat is the postcode for Donnybrook?Donnybrook, WA has the postcode 6239.What state is Donnybrook in?Donnybrook is in Western Australia (WA).Does postcode 6239 cover more than one suburb?Yes. Postcode 6239 covers 11 localities, so the postcode alone does not identify Donnybrook. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.