The 4th constituency of Finistère is a French legislative
constituency
An electoral (congressional, legislative, etc.) district, sometimes called a constituency, riding, or ward, is a geographical portion of a political unit, such as a country, state or province, city, or administrative region, created to provi ...
in the
Finistère
Finistère (, ; ) is a Departments of France, department of France in the extreme west of Brittany. Its prefecture is Quimper and its largest city is Brest, France, Brest. In 2019, it had a population of 915,090.''département''. Like the other 576 French constituencies, it elects one MP using the two-round system, with a run-off if no candidate receives over 50% of the vote in the first round.