List of United Kingdom Parliament constituencies (1801–1832)

This article provides a list of parliamentary constituencies in the United Kingdom that existed during the period from 1801 to 1832. This era begins with the Act of Union 1800, which united the Kingdom of Great Britain and the Kingdom of Ireland to form the United Kingdom of Great Britain and Ireland, and concludes with the Great Reform Act of 1832, which significantly altered the electoral landscape.

The list encompasses boroughs, counties, and universities that elected Members of Parliament (MPs) to the House of Commons. The representation varied considerably, with some constituencies, particularly rotten boroughs and pocket boroughs, having very small electorates and being subject to undue influence. County constituencies generally represented larger geographical areas and had a broader franchise, although often restricted to landowners. University constituencies were represented by graduates of those institutions.

The constituencies are categorized by country: England, Scotland, and Ireland. Within each country, they are typically listed alphabetically or by type (county, borough, university). Key information associated with each constituency includes:

• Name of the constituency: The official designation of the parliamentary seat.
• Number of MPs elected: How many representatives the constituency returned to Parliament.
• Description (brief): Notes on the constituency's characteristics, such as whether it was a rotten borough, pocket borough, or had significant economic or social features affecting elections.
• Notable features: Any particularly unusual or noteworthy aspects of the constituency's electoral history or influence.

The period covered by this list is characterized by calls for parliamentary reform, largely driven by industrialization, urbanization, and the growth of the middle class. The existing system of representation was seen as increasingly unfair and unrepresentative of the population. The Great Reform Act of 1832 redrew constituency boundaries, enfranchised new groups of voters, and abolished many of the rotten boroughs, fundamentally changing the composition of the House of Commons. This list provides a snapshot of the constituencies as they existed before that significant reform.