Home Postcode finder NSW Mona Vale Mona Vale postcode NSW Mona Vale is a locality in New South Wales covered by postcode 2103. Postcode 2103 State or territory New South Wales (NSW) Region Frenchs Forest Add a free Mona Vale business listing More business listings in Mona Vale Businesses in Mona ValeAlchemy TuitionPO Box 193 · 1300914329Artform Australia6-76 Darley Street · (02) 9979 9939Artform Australia6-76 · (02) 9979 9939 Common questionsWhat is the postcode for Mona Vale?Mona Vale, NSW has the postcode 2103.What state is Mona Vale in?Mona Vale is in New South Wales (NSW).Does postcode 2103 cover more than one suburb?No. Postcode 2103 covers Mona Vale 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.