Skip to main content
Visit the UK Parliament website
House of Commons Library
  • Home
  • Research
  • Resources
  • Training and events
  • Subscribe
  • Search
  1. UK Parliament
  2. House of Commons Library
  3. Elections data

Elections data

UK parliamentary by-elections since 1945

Monday, 23 January, 2023

This list notes the number of by-elections by session since 1945-46 and also lists the successful candidate in by-elections since 2005.

  • Research Briefing
  • Elections
  • UK elections
  • Elections data
UK parliamentary by-elections since 1945

UK Election Statistics: 1918-2022: A century of elections

Monday, 05 December, 2022

This Commons Library briefing paper presents an overview of UK election results since 1918. It provides summary results for all elections from 1918 to 2022, giving more extensive details about UK general elections. It also includes elections to the European Parliament, devolved legislatures and local government.

  • Research Briefing
  • Elections
  • Parliament
  • UK elections
  • Elections data
UK Election Statistics: 1918-2022: A century of elections

Constituency data: electorates

Tuesday, 12 April, 2022

Constituency-level data on electorates in the UK, including data for both the parliamentary and the local government franchise

  • Data Dashboard
  • UK elections
  • Elections data
Constituency data: electorates
  • 2021 Local Elections Handbook and dataset

    Tuesday, 12 April, 2022

    Explore the 2021 local election results handbook and download a comprehensive results dataset for English electoral districts and wards.

    • UK elections
    • data
    • Elections data
  • Data Dashboard

    Constituency data: election results

    Thursday, 18 June, 2020

    Search the results of the 2019 General Election for each constituency using the interactive dashboard

    • Data Dashboard
    • Elections
    • Elections data
  • Research Briefing

    General election results from 1918 to 2019

    Friday, 17 April, 2020

    This dataset presents UK general election results by constituency from 1918 onwards. It draws on several sources, described below, which may contain errors. For each constituency, the dataset includes the number of votes and vote share for different political parties, as well as the electorate and turnout. Turnout was calculated as valid votes divided by the electorate.

    • Research Briefing
    • Elections
    • Parliament
    • UK elections
    • Elections data
  • Research Briefing

    By-elections in the 2017 Parliament

    Friday, 03 April, 2020

    This Commons Library Briefing Paper sets out results of the by-elections held in the 2017 Parliament. There were five by-elections in the two year Parliament, details can be found in the report. Full details are presented in the associated PDF but an overview of the recent by-election results are shown below.

    • Research Briefing
    • House of Commons
    • Parliament
    • UK elections
    • Elections data
  • Research Briefing

    General Election 2019: full results and analysis

    Tuesday, 28 January, 2020

    This Commons Library Briefing Paper analyses the results of the 2019 General Election. It provides maps, charts and tables showing winners, votes, vote shares and turnout by party, region and constituency.

    • Research Briefing
    • Elections
    • House of Commons
    • Parliament
    • UK elections
    • Elections data
  • Research Briefing

    General Election 2017: full results and analysis

    Tuesday, 29 January, 2019

    This briefing paper contains detailed results and analysis of the 2017 General Election, held on 8th June. It provides election results by party & constituency, as well as analysis of voter trends, MP characteristics, and more.

    • Research Briefing
    • UK elections
    • Elections data
  • Research Briefing

    UK by-elections held more than 3 months after vacancy

    Tuesday, 25 July, 2017

    A by-election takes place in the House of Commons when a seat becomes vacant, either through the Member of Parliament dying or resigning the seat. This list notes by-elections that have taken place more than three months after the vacancy.

    • Research Briefing
    • Elections
    • House of Commons
    • Elections data
  • Research Briefing

    General Election 2015

    Tuesday, 28 July, 2015

    This briefing paper analyses the results of the 2015 General Election. It includes the election results by country, region and party, as well as the full result and turnout for every UK constituency. This is the second edition of the briefing paper, which provides additional analysis and statistics. New chapters in this edition cover seats changing hands, the characteristics of voters for each party, the characteristics of candidates and MPs, the electorate and turnout, safe and marginal seats, by-elections during the last Parliament, polling day, and the marginality of constituencies. The full results are available for download in two CSV files. The election results shown in this Briefing Paper were provided by Returning Officers following the 2015 General Election.

    • Research Briefing
    • Elections
    • House of Commons
    • Parliament
    • UK elections
    • Elections data

Quick Links

  • About us
  • Services for MPs and MPs’ staff
  • Research for this week’s business
  • Public feedback and complaints
  • Editorial policy
  • Work with us

By Topic

  • Brexit and the EU
  • Coronavirus
  • Economy, business and transport
  • Home affairs
  • Parliament and elections
  • Science, environment and technology
  • Social policy
  • World affairs
  • Full topic list

By Type

  • Research Briefings
  • Debate Packs
  • Insights
  • Data tools and resources
  • Constituency casework articles
  • All research

Mailing List

Subscribe to receive email alerts every time we publish new research about the topics you’re interested in.

Subscribe

Follow us:

  • Twitter

© House of Commons 2023. Re-use our content freely and flexibly with only a few conditions under the Open Parliament Licence.

Privacy notice | Cookie policy | Cookie settings | Accessibility statement