| Professor Frederick Lawson FBA | Year of birth 1897 | Year of death 1983 | Year elected 1956 | Fellowship category UK |
| Professor Gabriel Le Bras FBA | Year of birth 1891 | Year of death 1970 | Year elected 1948 | Fellowship category Corresponding |
| M Amable-Charles Franquet Le Comte De Franqueville FBA | Year of birth 1840 | Year of death 1919 | Year elected 1904 | Fellowship category Corresponding |
| Professor Jacques Le Goff FBA | Year of birth 1924 | Year of death 2014 | Year elected 1998 | Fellowship category Corresponding |
| Professor John Le Patourel FBA | Year of birth 1909 | Year of death 1981 | Year elected 1972 | Fellowship category UK |
| Professor Emmanuel Le Roy Ladurie FBA | Year of birth 1929 | Year of death 2023 | Year elected 1982 | Fellowship category Corresponding |
| Mr Henry Charles Lea FBA | Year of birth 1825 | Year of death 1909 | Year elected 1909 | Fellowship category Corresponding |
| Sir Edmund Leach FBA | Year of birth 1910 | Year of death 1989 | Year elected 1972 | Fellowship category UK |
| Dr Louis Leakey FBA | Year of birth 1903 | Year of death 1972 | Year elected 1958 | Fellowship category UK |
| Mrs Mary Leakey FBA | Year of birth 1913 | Year of death 1996 | Year elected 1973 | Fellowship category UK |
| Right Hon William Edward Hartpole Lecky PC, OM, FBA | Year of birth 1838 | Year of death 1903 | Year elected 1902 | Fellowship category UK |
| Professor Jean Leclant FBA | Year of birth 1920 | Year of death 2011 | Year elected 1991 | Fellowship category Corresponding |
| Dom Henri Leclercq OSB, FBA | Year of birth 1869 | Year of death 1945 | Year elected 1944 | Fellowship category Corresponding |
| Revd Jean Leclercq OSB, FBA | Year of birth 1911 | Year of death 1993 | Year elected 1969 | Fellowship category Corresponding |
| Professor Robert Warden Lee FBA | Year of birth 1868 | Year of death 1958 | Year elected 1933 | Fellowship category UK |
| Dr Seng Tee Lee Hon FBA | Year of birth 1923 | Year of death 2021 | Year elected 1997 | Fellowship category Honorary |