Baaiduinen is a village on the FrisianWadden Sea island Terschelling in the Netherlands. As of January 1, 2005, it had 123 inhabitants. Baaiduinen is surrounded by the much older hamlets of Kinnum, Kaart (Kaard) en Horp. Baaiduinen is the youngest village on Terschelling and has only been recognized as a separate settlement in the 19th century. North of Baaiduinen is a polder landscaped named het Hoge Land ("the highlands").
Tourism has replaced dairy farming as the main source of income and most farms have been rebuilt to accommodate tourists.