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MEMBRII ACADEMIEI ROMÂNE din 1866 până în prezent ()
| Nume | Data | Profesie | Membru AR | An |
| Ernest Camille Labrousse | 1895 - 1988 | istoric | 1957 | |
| Antoine Marcellin Bernard Lacassagne | 1884 - 1971 | radiolog, biolog | 1965 | |
| Constantin Lacea | 1875 - 1950 | filolog, lingvist | membru de onoare | 1939 |
| Georges Lacour-Gayet | 1856 - 1935 | istoric | 1919 | |
| Alfred François Antoine Lacroix | 1863 - 1948 | mineralog | 1931 | |
| Gheorghe I. Lahovary | 1838 - 1909 | inginer, scriitor | membru de onoare | 1901 |
| Traian Lalescu | 1882 - 1929 | matematician | ales post-mortem | 1991 |
| Scarlat Lambrino | 1891 - 1964 | istoric | membru corespondent | 1934 |
| Alexandru Lambrior | 1845 - 1883 | filolog, folclorist | membru corespondent | 1882 |
| Karl Gotthard Lamprecht | 1856 - 1915 | istoric | 1913 | |
| Rodolfo Amadeo Giuseppe Filippo Lanciani | 1845 - 1929 | arheolog | 1920 | |
| Alexandru I. Lapedatu | 1876 - 1950 | istoric, om politic | membru titular | 1918 |
| Ion I. Lapedatu | 1876 - 1951 | economist, om politic | membru de onoare | 1936 |
| Louis Lapique | 1866 - 1952 | medic | 1936 | |
| Mihail Th. Lascaris | 1903 - 1965 | istoric | 1933 | |
| Ferdinand Charles Léon conte de Lasteyrie | 1810 - 1879 | istoric, arheolog, om politic | 1871 | |
| Aladár Lászlóffy | 1937 - 2009 | scriitor | membru corespondent | 2003 |
| Vitalien Laurent | 1896 - 1973 | istoric | 1938 | |
| August Treboniu Laurian | 1810 - 1881 | filolog, istoric, publicist, om politic | membru fondator | 1867 |
| Dimitrie August Laurian | 1846 - 1906 | ziarist, critic literar | membru corespondent | 1877 |
| Charles Louis Alphonse Laveran | 1845 - 1922 | medic militar, parazitolog | 1914 | |
| Barbu Lăzăreanu | 1881 - 1957 | istoric literar, publicist | membru titular | 1948 |
| Henri Léon Lebesgue | 1875 - 1941 | matematician | 1923 | |
| Jean Leclant | 1920 - 2011 | Egiptolog, epigrafist, istoric | 1992 | |
| Émile André Lecomte de Noüy | 1844 - 1914 | arhitect | 1887 | |
| Louis-Paul-Marie Léger | 1843 - 1923 | lingvist, istoric | 1894 | |
| Émile-Louis-Jean Legrand | 1841 - 1903 | elenist | 1877 | |
| Jean-Marie Pierre Lehn | 1939 - *** | chimist | 1993 | |
| Karl Richard Lepsius | 1810 - 1884 | egiptolog | 1875 | |
| Jean Leray | 1906 - 1998 | matematician | 1991 | |
| Constantin Levaditi | 1874 - 1953 | inframicrobiolog | membru de onoare | 1926 |
| Ligeti György Sándor | 1923 - 2006 | compozitor | 1997 | |
| Charles Louis André Pantaléon de Linas | 1812 - 1887 | istoric | 1871 | |
| Frederick F. Ling | 1927 - 2014 | inginer | 1994 | |
| Dinu Lipatti | 1917 - 1950 | pianist, compozitor, pedagog | ales post-mortem | 1997 |
| Gabriel Jonas Ferdinand Lippmann | 1845 - 1921 | fizician | 1909 | |
| George Litarczek | 1925 - 2019 | medic | membru de onoare | 2017 |
| Jean Livescu | 1906 - 1996 | istoric literar | membru corespondent | 1965 |
| Alf Lombard | 1902 - 1996 | lingvist | 1947 | |
| Scarlat Longhin | 1899 - 1979 | general medic | membru corespondent | 1963 |
| Gheorghe Gh. Longinescu | 1869 - 1939 | chimist | membru de onoare | 1936 |
| Ştefan Gh. Longinescu | 1865 - 1931 | jurist | membru corespondent | 1910 |
| Henri Adrien Prévost de Lonpérier | 1816 - 1882 | istoric, arheolog | 1871 | |
| Antoon Hendrik Lorentz | 1853 - 1928 | fizician | 1913 | |
| Eugen Lovinescu | 1881 - 1943 | critic, istoric literar, scriitor | ales post-mortem | 1991 |
| Ştefan Luchian | 1868 - 1916 | pictor | ales post-mortem | 1948 |
| Ernst Ludwig | 1842 - 1915 | chimist | 1908 | |
| Maurice Lugéon | 1870 - 1953 | geolog | 1934 | |
| Giuseppe Lugli | 1890 - 1967 | arheolog | 1926 | |
| Ioan Lupaş | 1880 - 1967 | istoric, om politic | membru titular | 1916 |
| Gheorghe O. Lupaşcu | 1908 - 1979 | parazitolog | membru corespondent | 1948 |
| Ştefan Lupaşcu (Lupasco) | 1900 - 1988 | filosof | ales post-mortem | 1991 |
| Voicu Lupei | 1938 - *** | fizician | membru titular | 2018 |
| Nicolae Gh. Lupu | 1884 - 1966 | medic | membru titular | 1948 |