The majority of major political parties in Europe have aligned themselves into the pan-European political organisations listed below.

• Nine of these organisations have been legally recognized by the European Union as political parties at the European level:
  • European People's Party
  • Party of European Socialists
  • European Liberal Democrat and Reform Party
  • European Green Party
  • Party of the European Left
  • Alliance for Europe of the Nations
  • European Free Alliance
  • European Democratic Party
  • EUDemocrats
• The Nordic Green Left Alliance is a transnational federation of parties, not a pan-European political party per se, but it articulates a broadly uniform ideology and its membership is exclusive to it. As such, it is treated akin to one here.
• The European Democrats are an informal body who only express themselves as a subgroup in the European Parliament. They likewise enjoy a relative ideological uniformity and membership exclusive from the other organizations. They are also treated like the other pan-European political organizations in the below chart.

Only parties represented in national parliaments or the European Parliament are included in the below chart, while independents have been omitted. Please note that great ideological diversity can be found in most pan-European organizations, and individual country rows may not correspond with the heuristic left-right spectrum commonly used within its own political discourse.

Notes:

• Standalone parties with representation in the European Parliament are coloured by the parliamentary group in which they sit. These are:

EPP-ED	PES	ALDE	UEN	Non-Inscrits
EUL-NGL	Greens-EFA	IND/DEM	ITS

• Standalone parties with representation in the Parliamentary Assembly of the Council of Europe (but not the European Parliament) are coloured by the parliamentary group in which they sit in the former. These are:

EPP	PES	ALDE
EDG	EUL	Non-Attached

• The "Standalone parties of the political centre" column includes some single-interest parties that claim to draw support from all across the spectrum.
• † indicates the party has observer status within transnational organization
• National parties are sorted by the alignment adopted by the party's leadership; in some cases MEPs have chosen to sit in different groups within the EP.