Home Postcode finder NSW Oyster Bay Oyster Bay postcode NSW Oyster Bay is a locality in New South Wales covered by postcode 2225. Postcode 2225 State or territory New South Wales (NSW) Region Illawarra Add a free Oyster Bay business listing More business listings in Oyster Bay Businesses in Oyster BayAAA Movements34 Como Rd · 0295757614mycar Tyre & Auto CE Oyster BayShell Coles Express Service Station, Corner of Carvers Road and Georges River Road, Oyster Bay NSW, · (02) 9212 8962Oyster Bay Public SchoolShort St · 02 95287525 Common questionsWhat is the postcode for Oyster Bay?Oyster Bay, NSW has the postcode 2225.What state is Oyster Bay in?Oyster Bay is in New South Wales (NSW).Does postcode 2225 cover more than one suburb?No. Postcode 2225 covers Oyster Bay only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.