The historic county of Westmorland in north west England was represented in Parliament from the 13th century.
This article provides a list of constituencies constituting the Parliamentary representation from Westmorland.
In 1974 Westmorland was combined with Cumberland and northern Lancashire to form a new non-metropolitan county of Cumbria.
The first part of this article covers the constituencies wholly or predominantly within the area of the historic county of Westmorland, both before and after the administrative changes of 1974.
The constituencies which existed in 1707 were those previously represented in the Parliament of England.