Cockermouth was the name of a constituency of the House of Commons of the Parliament of England in 1295, and again from 1641, then of the Parliament of Great Britain from 1707 to 1800 and of the Parliament of the United Kingdom from 1801 to 1918. It was a parliamentary borough represented by two Members of Parliament until 1868, and by one member from 1868 to 1885. The name was then transferred to a county constituency electing one MP from 1885 until 1918.

Cockermouth is a market town and civil parish in the Cumberland unitary authority area of Cumbria, England, so named because it is at the confluence of the River Cocker as it flows into the River Derwent. The mid-2010 census estimates state that Cockermouth has a population of 8,204, increasing to 8,761 at the 2011 Census.