Home Postcode finder NSW Toowoon Bay Toowoon Bay postcode NSW Toowoon Bay is a locality in New South Wales covered by postcode 2261. Postcode 2261 State or territory New South Wales (NSW) Region Gosford Add a free Toowoon Bay business listing Be the first listing in Toowoon Bay Common questionsWhat is the postcode for Toowoon Bay?Toowoon Bay, NSW has the postcode 2261.What state is Toowoon Bay in?Toowoon Bay is in New South Wales (NSW).Does postcode 2261 cover more than one suburb?Yes. Postcode 2261 covers 15 localities, so the postcode alone does not identify Toowoon Bay. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.