- Source: Rosthwaite, Broughton West
Rosthwaite is a settlement in the Broughton West civil parish of Westmorland and Furness, Cumbria England. It is part of the Lake District, 3 miles (4.8 km) north-east of Broughton-in-Furness.
The settlement is within the Westmorland and Lonsdale constituency of the United Kingdom Parliament. Prior to Brexit in 2020 it was part of the North West England constituency of the European Parliament.