Neidpath Castle is an L-plan rubble-built tower house, overlooking the River Tweed just west of Peebles in the Borders of Scotland. The castle is open to the public, by arrangement. An early castle was probably founded here by Sir Gilbert Fraser in about 1190. His descendant, Sir Simon the Patriot, who was executed a year after Sir William Wallace in 1306.
The barony of Neidpath then passed to the Hay family, through marriage to Mary, the Fraser heiress and stayed with them until 1686, when the Duke of Queensberry bought it for his son The Earl of March. In 1810 it passed to the Wemyss family, who own it to this day.