Teylingen Castle is a Dutch castle in the municipality of Teylingen, in the town of Voorhout, near the border with Sassenheim. It is presumably the family keep of the noble family Van Teylingen, from which the Van Brederode family directly descended.
The castle was originally built to protect the north-south route in Hollandic territory. Later it became a forester's castle for the forestry of the counts of Holland, starting with William IV, count of Holland.
One of the best known inhabitants of the castle was Jacoba of Bavaria, who died there. At the time of her death she was married to her fourth husband Frank van Borssele. The drinking cups dug up in the surrounding area are called Jacobakanntjes.
At present, only the ruins of the castle remain. These remnants are well preserved, and consist of a surrounding wall and a donjon which forms part of the wall partially surrounded by water. The wall dates from the beginning of the 13th century and the main building shortly thereafter. The castle was damaged heavily around 1570 during the Eighty Years' War, and partially restored thereafter.