The ruins of Wulp Castle (German: Ruine Wulp or Burg Wulp) is a castle located besides Küsnachter Tobel in the municipality of Küsnacht and the canton of Zurich in Switzerland. It was built during the high Middle Ages. Despite this, the castle is documented only in a few found texts, and much of the castle's history is not known. However, in the chronicle of Muri Abbey, a castle that could perhaps fit Ruine Wulp's description - a castle in proximity to Zurich and Lake Zurich - was mentioned, but this has not been confirmed by other findings and is mere speculation.