As of 2024, the following European countries are not EU members but are in various stages of the accession process. "Joining" is not a single date—it's a multi-year negotiation.
| Country | Application | Candidate Status | Negotiations Opened |
|---|---|---|---|
| Montenegro | Dec 2008 | Dec 2010 | June 2012 (33 chapters opened, 3 provisionally closed) |
| Serbia | Dec 2009 | Mar 2012 | Jan 2014 (22 opened, 2 closed) |
| North Macedonia | Mar 2004 | Dec 2005 | July 2022 (after Bulgaria veto lifted) |
| Albania | Apr 2009 | Jun 2014 | July 2022 (linked with North Macedonia) |
| Turkey | Apr 1987 | Dec 1999 | Oct 2005 (stalled since 2016; 16 opened, 1 closed) |
| Ukraine | Feb 2022 | Jun 2022 | Not yet (screening underway) |
| Moldova | Mar 2022 | Jun 2022 | Not yet (screening underway) |
| Bosnia & Herzegovina | Feb 2016 | Dec 2022 (potential→candidate) | Not yet |
| Georgia | Mar 2023 | Dec 2023 | Not yet |
Candidate status ≠ guaranteed membership. Each must meet Copenhagen criteria (democracy, rule of law, market economy, acquis adoption). Timelines: Montenegro/Serbia earliest (late 2020s?); Ukraine/Moldova accelerated by war but reforms massive; Turkey frozen.