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The independent body which oversees elections and regulates political finance in the UK

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Electoral data

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.

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.

How is voter turnout calculated?

Turnout at UK-wide polls: 1999–2017

The chart below shows ballot box turnout at UK-wide polls since 1999.

Valid votes turnout at UK Parliament general elections: 1922–2017 (XLSX)

Research