Earl of Wemyss is a title in the Peerage of Scotland created in 1633. The Scottish Wemyss family had possessed the lands of Wemyss in Fife since the 12th century. Since 1823 the earldom has been held with the Earldom of March, created in 1697. The holder of the title is sometimes known as the Earl of Wemyss and March, but the titles are distinct.

Wemyss Castle is situated in Wemyss on the sea cliffs between the villages of East Wemyss and West Wemyss in Fife, Scotland. Wemyss Castle is considered to be a multi-period building, and today's castle includes many elements from former periods such as the 15th century tower and the 19th century stables and gatepiers.