| Abbr. | Logo | Ideology | Founded | Founder | Leader | Website | European Parliament Group |
| DP |  | Liberalism, Social liberalism, Conservative liberalism, Pro-Europeanism | 24.04.1955 | Lex Delles | http://www.dp.lu |  |
Elections
| Date | Elections | % | Votes | Seats | |
| 2023 | 18,70 | 703.833 | 14 | 3rd | |
| 2019 | EU | 21,44 | 268.910 | 2 | 1st |
| 2018 | 16,91 | 597.080 | 12 | 3rd | |
| 2014 | EU | 14,78 | 173.255 | 1 | 3rd |
| 2013 | 18,27 | 596.736 | 13 | 3rd | |
| 2009 | 14,31 | 432.820 | 9 | 3rd | |
| 2009 | EU | 18,65 | 209.123 | 1 | 3rd |
| 2004 | 14,93 | 460.867 | 10 | 3rd | |
| 2004 | EU | 14,87 | 161.507 | 1 | 4th |
| Leaders | |
| 1948 – 1952 | Lucien Dury |
| 1952 – 1959 | Eugène Schaus |
| 1959 – 1962 | Lucien Dury |
| 1962 – 1969 | Gaston Thorn |
| 1969 – 1971 | René Konen |
| 1971 – 1980 | Gaston Thorn |
| 1980 – 1989 | Colette Flesch |
| 1989 – 1994 | Charles Goerens |
| 1994 – 2004 | Lydie Polfer |
| 2004 – 2013 | Claude Meisch |
| 2013 – 2015 | Xavier Bettel |
| 2015 – 2022 | Corinne Cahen |
| 2022 – | Lex Delles |
