Home Postcode finder WA Rottnest Island Rottnest Island postcode WA Rottnest Island is a locality in Western Australia covered by postcode 6161. Postcode 6161 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free Rottnest Island business listing More business listings in Rottnest Island Businesses in Rottnest IslandRottnest Island Primary School14 Kelly St · 08 92925005Skydive GeronimoBrand Way, Rottnest Island WA 6161, Australia · 0429 486 737 Common questionsWhat is the postcode for Rottnest Island?Rottnest Island, WA has the postcode 6161.What state is Rottnest Island in?Rottnest Island is in Western Australia (WA).Does postcode 6161 cover more than one suburb?No. Postcode 6161 covers Rottnest Island only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.