Skærbæk (German: Scherrebek) is a town and a former municipality (Danish, kommune) on the coast of Tønder municipality in Region Syddanmark on the Jutland peninsula in south Denmark. The former Skærbæk municipality covered an area of 360 km², and had a total population of 7,294 (2005).
The municipaliy included the island of Rømø, the southernmost of Denmark's part of the North Frisian Islands. The island, which lies in the Wadden Sea ca. 6.5 km from the mainland, is a popular beach area in the summer, and is linked to the mainland by a road— Rømøvej— running across a causeway. There is ferry service from the harbour on Rømø to another popular summer island, the German island of Sylt, less than 4 km south of Rømø.
The municipality was created in 1970 as the result of a kommunalreform ("Municipality Reform") that merged a number of existing parishes:
