Side by side, never added together

Legislators

Elected members and the websites each publishes. Each region’s population is its own cohort, drawn from that country’s own register and scored against the same Index. There is no figure across regions: it would be a number about whichever region has more sites.

Index 12.1 · Census Q4 2026

2 populations, 2 measured

Legislators in each region

RegionPopulation Median and spreadScanned Gated
United States US Members of Congress
Every sitting senator, representative, delegate and resident commissioner, with their official website. Left out because the seat was vacant at the build date: FL-20, TX-23.
The @unitedstates project (unitedstates/congress-legislators)
28 · 28–33
539/539 539 of 539
United Kingdom UK and Devolved Parliament Members
Every sitting Member of Parliament, Member of the Scottish Parliament, Member of the Senedd and Member of the Northern Ireland Assembly, with the website each publishes.
UK Parliament; Scottish Parliament; Senedd Cymru / Welsh Parliament; Northern Ireland Assembly
60 · 28–77
421/965 119 of 421

Purple line is the median. Grey band is the middle half of the range. A population drawn from a different kind of register is not the same population: the UK’s schools are schools, where the US cohort is the districts that run them.

Comparisons

The other comparisons