List of counties and boroughs of the unreformed House of Commons in 1800

This is a list of the counties and boroughs of the unreformed House of Commons.


 * In the following tables, the size of the electorate is shown as it was estimated to be in about 1800. These figures are estimates only, particularly in seats which were rarely contested.
 * In England, Scotland and Wales, there were 29 general elections between 1700 and the Reform Act of 1832. In Ireland, there were 11 elections between the Act of Union in 1801 and 1832. The figure under "Times contested" is the number of general elections at which the seat was contested during these periods. By-elections are not counted.
 * The dominant families in the counties gradually changed over time. They are shown as they were around 1800.
 * Monmouthshire was an English county from its formation in 1536, although it is in most respects Welsh and was formally made part of Wales in 1974.

English boroughs
In alphabetical order by county