| Owen Lovejoy | American politician | 1811–1864 |
| Ada Lovelace | English mathematician, consid… | 1815–1852 |
| Earl Lovelace | Trinidad and Tobago writer | 1935 |
| Maud Hart Lovelace | American writer | 1892–1980 |
| Richard Lovelace | English writer and poet | 1617–1658 |
| James E. Lovelock | independent scientist, enviro… | 1919 |
| Samuel Lover | Irish song-writer, novelist, … | 1797–1868 |
| Paul Loverde | American Roman Catholic bishop | 1940 |
| Amory B. Lovins | American physicist | 1947 |
| Frank J. Low | American astronomer | 1933–2009 |
| Nick Lowe | British singer | 1949 |
| Amy Lowell | US writer | 1874–1925 |
| James Russell Lowell | American poet, critic, editor… | 1819–1891 |
| Percival Lowell | American astronomer | 1855–1916 |
| Robert Lowell | Poet | 1917–1977 |
| Yuri Lowenthal | American voice actor | 1971 |
| Joseph Lowery | American activist | 1921 |
| John Livingston Lowes | American academic | 1867–1945 |
| Karl Löwith | German philosopher | 1897–1973 |
| Bernard Lown | American cardiologist develop… | 1921–2021 |
| Lois Lowry | American writer | 1937 |
| L. S. Lowry | British visual artist | 1887–1976 |
| Malcolm Lowry | British writer | 1909–1957 |
| Rich Lowry | American journalist | 1968 |
| Michael Löwy | French sociologist | 1938 |
| Mina Loy | Futurist poet and actress | 1882–1966 |
| Myrna Loy | American film, television and… | 1905–1993 |
| Ignatius of Loyola | Catholic Saint, founder of th… | 1491–1556 |
| Petro Loza | roman-catholic bishop | 1979 |
| Evelyn Lozada | American reality show partici… | 1975 |
| Jorge Eduardo Lozano | Catholic archbishop | 1955 |
| Natalia Lozovsky | medieval historian | |
| Annette Lu | Taiwanese politician | 1944 |
| Jun Hong Lu | Australian Buddhist leader | 1959 |
| Thế Lữ | | 1907–1989 |
| Henri de Lubac | Jesuit theologian and cardinal | 1896–1991 |
| David Lubar | Children's writer and game pr… | 1954 |
| Shelley Lubben | author, singer, motivational … | 1968–2019 |
| Max Lucado | American clergyman and writer | 1955 |
| Marcus Annaeus Lucanus | Roman poet | 39–65 |
| Caroline Lucas | British politician, MP of the… | 1960 |
| George Lucas | American film producer | 1944 |
| Isabel Lucas | Australian actress | 1985 |
| Josh Lucas | American actor | 1971 |
| Melissa Lucashenko | Australian writer | 1967 |
| Halford E. Luccock | American Methodist minister | 1885–1960 |
| Clare Boothe Luce | American writer, politician, … | 1903–1987 |
| Edward Luce | journalist | 1968 |
| Phillip Abbott Luce | | 1935–1998 |
| Lucian | ancient Greek writer | 120 |
| Lucky Luciano | Italian-American mobster | 1897–1962 |
| Edward Lucie-Smith | British art critic, writer an… | 1933 |
| Thomas Luckmann | American-Austrian sociologist | 1927–2016 |
| Lucretius | Roman poet and philosopher | -94–-55 BC |
| Ludacris | American rapper and actor | 1977 |
| Erich Ludendorff | German Army officer and later… | 1865–1937 |
| Robert Ludlum | Novelist | 1927–2001 |
| Arnold M. Ludwig | | |
| Emil Ludwig | German writer | 1881–1948 |
| Lugalbanda | | |
| Béla Lugosi | Hungarian actor | 1882–1956 |
| Niklas Luhmann | German sociologist, administr… | 1927–1998 |
| Baz Luhrmann | Australian film director, scr… | 1962 |
| Bob van Luijt | Dutch entrepreneur | 1985 |
| György Lukács | Marxist philosopher and liter… | 1885–1971 |
| Alexander Lukashenko | President of Belarus since 20… | 1954 |
| Steven Lukes | British sociologist | 1941 |
| Greg Lukianoff | American lawyer | |
| Sergei Lukyanenko | Russian science fiction writer | 1968 |
| Sidney Lumet | American director, producer a… | 1924–2011 |
| Patrice Lumumba | Congolese Prime Minister, col… | 1925–1961 |
| Gerald N. Lund | American Mormon leader | 1939 |
| Ferdinand Lundberg | American journalist | 1905–1995 |
| Joan Lunden | Television journalist | 1950 |
| Dolph Lundgren | Swedish actor | 1957 |
| Hau Lung-pin | Taiwanese politician | 1952 |
| Arnold Lunn | British writer and skier | 1888–1974 |
| Shlomo Ephraim Luntschitz | Polish rabbi | 1550–1619 |
| Valya Dudycz Lupescu | American writer | 1974 |
| Alison Lurie | American novelist and academic | 1926 |
| Masiela Lusha | Albanian actress, writer, aut… | 1985 |
| Patrick Lussier | Canadian-American film direct… | 1964 |
| Jean-Marie Cardinal Lustiger | French Catholic cardinal | 1926–2007 |
| Martin Luther | seminal figure in Protestant … | 1483–1546 |
| Daniele Luttazzi | Italian comedian | 1961 |
| Albert Lutuli | South African politician | 1898–1967 |
| Edwin Lutyens | British architect | 1869–1944 |
| Lisa Lutz | US author | 1970 |
| Robert Lutz | | |
| Viktor Lutze | SA Stabschef | 1890–1943 |
| Thomas Lux | American poet | 1946–2017 |
| Henri of Luxembourg | Grand Duke (head of state) of… | 1955 |
| Rosa Luxemburg | Polish Marxist theorist, soci… | 1871–1919 |
| Moshe Chaim Luzzatto | Italian rabbi | 1707–1746 |
| Dimitris Lyacos | Greek writer | 1966 |
| Lycurgus | Ancient Greek politician and … | -390–-324 BC |
| John Lydgate | monk and poet | 1370–1450 |
| John Lydon | English singer, songwriter, a… | 1956 |
| Michael Lydon | Irish politician | 1907–1977 |
| Charles Lyell | British lawyer and geologist | 1797–1875 |
