A list of the United Kingdom's four constituent countries (and English regions) by population as recorded by the 2001 Census:
- South East - London - North West - East - West Midlands - Yorkshire and the Humber - South West - East Midlands - North East
8,000,550 7,172,036 6,729,800 5,388,154 5,267,337 4,964,838 4,928,458 4,172,179 2,515,479
13.6% 12.2% 11.4% 9.2% 9.0% 8.4% 8.4% 7.1% 4.3%
source: the 2001 census