Baaiduinen is a village on the Frisian Wadden Sea island of 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.