| Rank | Prime Minister | Image | Assumed Office | Left Office | TERM Time in Office | TOTAL Time in Office | | 1 | Charles Rogier | | 12 August 1847 | 31 October 1852 | {{age in years and days>1847|8|12|1852|10|31}} | 15 years, 135 days |
9 November 1857 | 3 January 1868 | {{age in years and days>1857|11|9|1868|1|3}} |
| 2 | Wilfried Martens | | 3 April 1979 | 31 March 1981 | {{age in years and days>1979|4|3|1981|3|31}} | 12 years, 78 days |
17 December 1981 | 7 March 1992 | {{age in years and days>1981|12|17|1992|3|7}} |
| 3 | Paul de Smet de Naeyer | | 25 February 1896 | 24 January 1899 | {{age in years and days>1896|2|25|1899|1|24}} | 10 years, 238 days |
5 August 1899 | 2 May 1907 | {{age in years and days>1899|8|5|1907|5|2}} |
| 4 | Barthélémy de Theux de Meylandt | | 4 August 1834 | 18 April 1840 | {{age in years and days>1834|8|4|1840|4|18}} | 9 years, 283 days |
31 March 1846 | 12 August 1847 | {{age in years and days>1846|3|31|1847|8|12}} |
7 December 1871 | 21 August 1874 | {{age in years and days>1871|12|7|1874|8|21}} |
| 5 | Auguste Beernaert | 26 October 1884 | 26 March 1894 | {{age in years and days>1884|10|26|1894|3|26}} |
| 6 | Charles de Broqueville | | 17 June 1911 | 1 June 1918 | {{age in years and days>1911|6|17|1918|6|1}} | 9 years, 13 days |
22 October 1932 | 20 November 1934 | {{age in years and days>1932|10|22|1934|11|20}} |
| 7 | Guy Verhofstadt | 12 July 1999 | 20 March 2008 | {{age in years and days>1999|7|12|2008|3|20}} |
| 8 | Walthère Frère-Orban | | 3 January 1868 | 2 July 1870 | {{age in years and days>1868|1|3|1870|7|2}} | 8 years, 178 days |
19 June 1878 | 16 June 1884 | {{age in years and days>1878|6|19|1884|6|16}} |
| 9 | Gaston Eyskens | | 11 August 1949 | 8 June 1950 | {{age in days>1949|8|11|1950|6|8}} days | 8 years, 67 days |
26 June 1958 | 25 April 1961 | {{age in years and days>1958|6|26|1961|4|25}} |
17 July 1968 | 26 January 1973 | {{age in years and days>1968|7|17|1973|1|26}} |
| 10 | Jean-Luc Dehaene | 7 March 1992 | 12 July 1999 | {{age in years and days>1992|3|7|1999|7|12}} |
| 11 | Hubert Pierlot | 22 February 1939 | 12 February 1945 | {{age in years and days>1939|2|22|1945|2|12}} |
| 12 | Achille Van Acker | | 12 February 1945 | 13 March 1946 | {{age in years and days>1945|2|12|1946|3|13}} | 5 years, 218 days |
31 March 1946 | 3 August 1946 | {{age in days>1946|3|31|1946|8|3}} days |
23 April 1954 | 26 June 1958 | {{age in years and days>1954|4|23|1958|6|26}} |
| 13 | Henri Jaspar | 20 May 1926 | 6 June 1931 | {{age in years and days>1926|5|20|1931|6|6}} |
| 14 | Leo Tindemans | 25 April 1974 | 20 October 1978 | {{age in years and days>1974|4|25|1978|10|20}} |
| 15 | Charles Michel | 11 October 2014 | incumbent | {{age in years and days>2014|10|11}}[1] |
| 16 | Jean-Baptiste Nothomb | 13 April 1841 | 30 July 1845 | {{age in years and days>1841|4|13|1845|7|30}} |
| 17 | Théo Lefèvre | 25 April 1961 | 28 July 1965 | {{age in years and days>1961|4|25|1965|7|28}} |
| 18 | Jules Malou | | 21 August 1874 | 19 June 1878 | {{age in years and days>1874|8|21|1878|6|19}} | 4 years, 69 days |
16 June 1884 | 26 October 1884 | {{age in days>1884|6|16|1884|10|26}} days |
| 19 | Georges Theunis | | 16 December 1921 | 13 May 1925 | {{age in years and days>1921|12|16|1925|5|13}} | 3 years, 273 days |
20 November 1934 | 25 March 1935 | {{age in days>1934|11|20|1935|3|25}} days |
| 20 | Frans Schollaert | 9 January 1908 | 17 June 1911 | {{age in years and days>1908|1|9|1911|6|17}} |
| 21 | Paul-Henri Spaak | | 15 May 1938 | 22 February 1939 | {{age in days>1938|5|15|1939|2|22}} days | 3 years, 80 days |
13 March 1946 | 31 March 1946 | {{age in days>1946|3|13|1946|3|31}} days |
20 March 1947 | 11 August 1949 | {{age in years and days>1947|3|20|1949|8|11}} |
| 22 | Elio Di Rupo | 6 December 2011 | 11 October 2014 | {{age in years and days>2011|12|6|2014|10|11}} |
| 23 | Yves Leterme | | 20 March 2008 | 30 December 2008 | {{age in days>2008|3|20|2008|12|30}} days | 2 years, 296 days |
25 November 2009 | 6 December 2011 | {{age in years and days>2009|11|25|2011|12|6}} |
| 24 | Paul Vanden Boeynants | | 19 March 1966 | 17 July 1968 | {{age in years and days>1966|3|19|1968|7|17}} | 2 years, 285 days |
20 October 1978 | 3 April 1979 | {{age in days>1978|10|20|1979|4|3}} days |
| 25 | Paul van Zeeland | 25 March 1935 | 24 November 1937 | {{age in years and days>1935|3|25|1937|11|24}} |
| 26 | Pierre de Decker | 30 March 1855 | 9 November 1857 | {{age in years and days>1855|3|30|1857|11|9}} |
| 27 | Henri de Brouckère | 31 October 1852 | 30 March 1855 | {{age in years and days>1852|10|31|1855|3|30}} |
| 28 | Jean Van Houtte | 15 January 1952 | 23 April 1954 | {{age in years and days>1952|1|15|1954|4|23}} |
| 29 | Léon Delacroix | 21 November 1918 | 20 November 1920 | {{age in years and days>1918|11|21|1920|11|20}} |
| 30 | Jules de Burlet | 26 March 1894 | 25 February 1896 | {{age in years and days>1894|3|26|1896|2|25}} |
| 31 | Albert Goblet d'Alviella | 20 October 1832 | 4 August 1834 | {{age in years and days>1832|10|20|1834|8|4}} |
| 32 | Jules d'Anethan | 2 July 1870 | 7 December 1871 | {{age in years and days>1870|7|2|1871|12|7}} |
| 33 | Joseph Pholien | 16 August 1950 | 15 January 1952 | {{age in years and days>1950|8|16|1952|1|15}} |
| 34 | Jules Renkin | 6 June 1931 | 22 October 1932 | {{age in years and days>1931|6|6|1932|10|22}} |
| 35 | Joseph Lebeau | | 28 March 1831 | 21 July 1831 | {{age in days>1831|3|28|1831|7|21}} days | 1 year, 110 days |
18 April 1840 | 13 April 1841 | {{age in days>1840|4|18|1841|4|13}} days |
| 36 | Edmond Leburton | 26 January 1973 | 25 April 1974 | {{age in years and days>1973|1|26|1974|4|25}} |
| 37 | Félix de Muelenaere | 24 July 1831 | 20 October 1832 | {{age in years and days>1831|7|24|1832|10|20}} |
| 38 | Henri Carton de Wiart | 20 November 1920 | 16 December 1921 | {{age in years and days>1920|11|20|1921|12|16}} |
| 39 | Prosper Poullet | 17 June 1925 | 20 May 1926 | {{age in days>1925|6|17|1926|5|20}} days |
| 40 | Herman Van Rompuy | 30 December 2008 | 25 November 2009 | {{age in days>2008|12|30|2009|11|25}} days |
| 41 | Mark Eyskens | 31 March 1981 | 17 December 1981 | {{age in days>1981|3|31|1981|12|17}} days |
| 42 | Sylvain Van de Weyer | 30 July 1845 | 31 March 1846 | {{age in days>1845|7|30|1846|3|31}} days |
| 43 | Jules de Trooz | 2 May 1907 | 31 December 1907 | {{age in days>1907|5|2|1907|12|31}} days |
| 44 | Pierre Harmel | 28 July 1965 | 19 March 1966 | {{age in days>1965|7|28|1966|3|19}} days |
| 45 | Camille Huysmans | 3 August 1946 | 20 March 1947 | {{age in days>1946|8|3|1947|3|20}} days |
| 46 | Jules Vandenpeereboom | 24 January 1899 | 5 August 1899 | {{age in days>1899|1|24|1899|8|5}} days |
| 47 | Gérard Cooreman | 1 June 1918 | 21 November 1918 | {{age in days>1918|6|1|1918|11|21}} days |
| 48 | Paul-Émile Janson | 24 November 1937 | 15 May 1938 | {{age in days>1937|11|24|1938|5|15}} days |
| 49 | Jean Duvieusart | 8 June 1950 | 16 August 1950 | {{age in days>1950|6|8|1950|8|16}} days |
| 50 | Aloys Van de Vyvere | 13 May 1925 | 17 June 1925 | {{age in days>1925|5|13|1925|6|17}} days |
| 51 | Étienne de Gerlache | 27 February 1831 | 10 March 1831 | {{age in days>1831|2|27|1831|3|10}} days |
1. ^As of {{CURRENTDAY}} {{CURRENTMONTHNAME}} {{CURRENTYEAR}}
{{Governments of Belgium}}{{Belgium topics}}{{European Council}}{{Europe heads of state and government}}{{DEFAULTSORT:Prime Minister Of Belgium}}