Dunnerdale-with-Seathwaite is a civil parish in the Westmorland and Furness district of the ceremonial county of Cumbria, England. It includes the village of Seathwaite and the hamlets of Cockley Beck, Hall Dunnerdale and Hoses, and is located 6.2 mi north of Broughton in Furness, 34.0 mi west of Kendal and 57.3 mi south of Carlisle. In the 2001 census the parish had a population of 129, decreasing at the 2011 census to 119. Since 1976 the parish has been governed by Duddon Parish Council.