| Madeleine L'Engle | American writer | 1918–2007 |
| Vladimir Lenin | Russian politician, led the O… | 1870–1924 |
| Florence Becker Lennon | | |
| John Lennon | English singer and songwriter | 1940–1980 |
| John Lennox | British mathematician and phi… | 1943 |
| Jay Leno | American comedian, actor, wri… | 1950 |
| William Lenthall | English politician, died 1662 | 1591–1662 |
| Daniel De Leon | American newspaper editor | 1852–1914 |
| Harmon Leon | | |
| Valerie Leon | English actress | 1943 |
| Mónica Esmeralda León | actress | 1991 |
| Elmore Leonard | American novelist and screenw… | 1925–2013 |
| John Leonard | American critic, writer, and … | 1939–2008 |
| Sugar Ray Leonard | American boxer | 1956 |
| Vittorio Leonardi | South African stand-up comedi… | 1977 |
| Nathan Leone | American musician | 1981 |
| Sergio Leone | Italian film director, screen… | 1929–1989 |
| Wassily Leontief | Russian economist | 1906–1999 |
| Mikhail Leontyev | Russian television pundit | 1958 |
| Giacomo Leopardi | Italian poet, philosopher and… | 1798–1837 |
| Aldo Leopold | American writer and scientist | 1887–1948 |
| John R. Leopold | politician | 1943 |
| Warren Leopold | | 1920–1998 |
| Paul LePage | American businessman, Republi… | 1948 |
| Jill Lepore | American historian | 1966 |
| Lois Gladys Leppard | American writer | 1924–2008 |
| Rosanna Eleanor Leprohon | Canadian writer | 1829–1879 |
| Peter Lerangis | American writer | 1955 |
| Rasmus Lerdorf | Danish programmer and creator… | 1968 |
| Mikhail Lermontov | Russian writer, poet and pain… | 1814–1841 |
| Abba Lerner | American economist | 1903–1982 |
| Alan Jay Lerner | lyricist and librettist from … | 1918–1986 |
| Gerda Lerner | Austrian-American women's his… | 1920–2013 |
| Harriet Lerner | American psychologist | 1944 |
| Max Lerner | American journalist and educa… | 1902–1992 |
| Penny Lernoux | American writer and journalist | 1940–1989 |
| Gaston Leroux | French writer | 1868–1927 |
| Xavier Leroy | French computer scientistand … | 1968 |
| Menotti Lerro | Italian poet | 1980 |
| Alain-René Lesage | French writer | 1668–1747 |
| John Lescroart | Novelist, screenwriter | 1948 |
| Charles Robert Leslie | British painter (1794-1859) | 1794–1859 |
| Desmond Leslie | British pilot, film maker, wr… | 1921–2001 |
| Lawrence Lessig | American academic, political … | 1961 |
| Doris Lessing | British novelist, poet, playw… | 1919–2013 |
| Gotthold Ephraim Lessing | writer, philosopher, publicis… | 1729–1781 |
| Jason P. Lester | American triathlete and dista… | 1974 |
| Julius Lester | American author | 1939–2018 |
| Larry LeSueur | American journalist | 1909–2003 |
| Stanisław Leszczyński | king of Poland | 1677–1766 |
| Thomas Charles Lethbridge | British explorer and archaeol… | 1901–1971 |
| Jonathan Lethem | Novelist, essayist, short sto… | 1964 |
| Jared Leto | American actor and musician | 1971 |
| Shannon Leto | American musician and songwri… | 1970 |
| Kathy Lette | Australian author | 1958 |
| David Letterman | American comedian and actor | 1947 |
| Billie Letts | American novelist and educator | 1938–2014 |
| Graeme Leung | Fijian lawyer | |
| Katie Leung | Scottish actress | 1987 |
| Tony Leung | Hong Kong actor | 1962 |
| Wong Shun Leung | martial artist | 1935–1997 |
| Michael Leunig | Australian artist | 1945 |
| Jacob Leupold | German multidisciplinary scie… | 1674–1727 |
| Jiri Lev | | 1979 |
| Oscar Levant | American comedian, composer, … | 1906–1972 |
| Simon LeVay | American neuroscientist | 1943 |
| Jon D. Levenson | American biblical scholar | 1949 |
| Sam Levenson | American journalist | 1911–1980 |
| William Lever, 1st Viscount Leverhulme | English industrialist, philan… | 1851–1925 |
| Ada Leverson | British writer | 1862–1933 |
| Denise Levertov | Poet | 1923–1997 |
| René Lévesque | Quebec politician | 1922–1987 |
| Carlo Levi | Italian painter | 1902–1975 |
| Eliphas Levi | French writer | 1810–1875 |
| Peter Levi | writer, archaeologist, someti… | 1931–2000 |
| Primo Levi | Italian chemist, memoirist, s… | 1918–1987 |
| Lev Leviev | Soviet-born Israeli businessm… | 1956 |
| Rita Levi-Montalcini | Italian neurologist | 1909–2012 |
| Carl Levin | American politician | 1934 |
| Gail Levin | art historian | 1948 |
| Ira Levin | Novelist, playwright | 1929–2007 |
| Janna Levin | American theoretical cosmolog… | 1967 |
| Emmanuel Levinas | French philosopher | 1906–1995 |
| Adam Levine | singer, songwriter, actor, an… | 1979 |
| Bruce E. Levine | American psychologist | |
| David D. Levine | science fiction writer | 1961 |
| Donald N. Levine | sociologist | 1931–2015 |
| Gail Carson Levine | American writer | 1947 |
| Jack Levine | American artist | 1915–2010 |
| Montague Levine | British surgeon | 1922–2013 |
| Noah Levine | American Buddhist teacher | 1971 |
| Peter A. Levine | American psychologist | 1942 |
| Philip Levine | Poet | 1928–2015 |
| Stephen Levine | American poet and author | 1937–2016 |
| Yasha Levine | journalist | |
| Jay Conrad Levinson | American business writer | 1933–2013 |
| Claude Lévi-Strauss | French anthropologist and eth… | 1908–2009 |
| Isaac Levitan | Russian artist | 1860–1900 |
| Timothy Levitch | American actor | 1970 |
| David Levithan | American author and editor | 1972 |
