We collect electoral data after all elections and referendums.
The data covers a range of areas including electorates, turnout, rejected ballot papers and postal voting figures.
- Electoral data and reports on the administration of elections and referendums
- Election results can be found on our Election results page.
Below you can find information on how turnout is calculated and turnout data for UK-wide polls and UK Parliament general elections.
How is voter turnout calculated?
There are different methods to calculate turnout. In our reports and data collection we use three different measures of turnout.
Turnout at UK-wide polls: 1999–2017
The chart below shows ballot box turnout at UK-wide polls since 1999.