The COMEPELDA collection consolidates information on European Parliament (EP) elections into one comprehensive source. It provides information on formal electoral rules as well as national-level and district-level election results for parties and individual politicians (including full candidate lists). The use of existing and new key variables makes it easy to link the data across the different units of observation (country, party, candidate, MEP) and join them with external information. Currently, the data cover four elections (1999–2014).

List of databases on electoral and parliamentary data.

The next elections to the European Parliament will be held in June 2024. This page projects how the EU Parliament would look like if there was an election held in month X.

The European Election Studies (EES) offer data about electoral behaviour in European Parliament elections. Collecting survey data as well as a variety of other data types, they cover topics such as the evolution of a political community in the European Union, citizens' perceptions of and preferences about the EU political regime, and the evaluation of its political performance. They offer wide opportunities for comparative and longitudinal analyses across the EU member states.

Statista.com consolidates statistical data on over 80,000 topics from more than 22,500 sources and makes it available on four platforms: German, English, French and Spanish.
European Commission staff need to register to get full access to Statista.

Parties and Elections in Europe provides a comprehensive database about political parties, elections and governments in all European countries. The website contains the results of parliamentary elections from more than 100 countries and autonomous regions in Europe. The parties are classified according to their political orientation. Historical data can be found in the archive.