| Corbin Bleu | American actor, model, dancer… | 1989 |
| Fritz Bleyl | German artist | 1880–1966 |
| Louis-Marie de Blignières | French traditionalist Catholi… | 1949 |
| Didymus the Blind | Coptic church theologian | 313–398 |
| Alan Blinder | economist | 1945 |
| Blink-182 | | |
| Antony Blinken | American government official … | 1962 |
| James Blish | American author | 1921–1975 |
| Hans Blix | Swedish politician | 1928 |
| Karen Blixen | Danish writer | 1885–1962 |
| Paul Blobel | German SS officer and Holocau… | 1894–1951 |
| Ernst Bloch | German philosopher | 1885–1977 |
| Felix Bloch | | |
| Marc Bloch | French historian, medievalist… | 1886–1944 |
| Barbara Block | American marine biologist | 1958 |
| Francesca Lia Block | American children's writer | 1962 |
| Jay A. Block | | |
| Lawrence Block | American writer | 1938 |
| Henry Blodget | American equity research anal… | 1966 |
| Nicolaas Bloembergen | Dutch-born American physicist | 1920–2017 |
| Peter of Blois | French poet and diplomat | |
| Alexander Blok | poet | 1880–1921 |
| Eric Blom | Swiss-born British-naturalise… | 1888–1959 |
| Werner von Blomberg | German field marshal | 1878–1946 |
| Phillip Blond | British philosopher | 1966 |
| Allan Bloom | American philosopher, classic… | 1930–1992 |
| Amy Bloom | Fiction writer, screenwriter,… | 1953 |
| Godfrey Bloom | UK EU parliament member | 1949 |
| Harold Bloom | American literary critic and … | 1930–2019 |
| Howard Bloom | American publicist and author | 1943 |
| Orlando Bloom | British actor | 1977 |
| Paul Bloom | Canadian/American psychologist | 1963 |
| Michael Bloomberg | American businessman and poli… | 1942 |
| Robert Bloomfield | British writer | 1766–1823 |
| Charles M. Blow | American journalist | 1970 |
| Jonathan Blow | American video game designer … | 1971 |
| Léon Bloy | French writer, poet and essay… | 1846–1917 |
| Blu | American rapper and music pro… | 1983 |
| Hans Blüher | German journalist and writer | 1888–1955 |
| Jason Blum | American film producer | 1969 |
| Jenna Blum | American writer | 1970 |
| Léon Blum | French politician | 1872–1950 |
| William Blum | American author and historian | 1933–2018 |
| Baruch Samuel Blumberg | American doctor | 1925–2011 |
| Judy Blume | American children's writer | 1938 |
| Michael A. Blume | American nuncio | 1946 |
| Earl Blumenauer | American politician | 1948 |
| Edmund Blunden | English poet, author and lite… | 1896–1974 |
| James Blunt | English singer-songwriter | 1974 |
| Roy Blunt | American politician | 1950 |
| Wilfrid Scawen Blunt | English poet and writer | 1840–1922 |
| Rikka Blurhound | Malaysian cosplayer and nutri… | |
| Don Bluth | American animator | 1937 |
| Robert W. Bly | American writer | 1957 |
| Bert Blyleven | Major League Baseball player … | 1951 |
| Ann Blyth | American actress | 1928 |
| Randy Blythe | American musician | 1971 |
| Enid Blyton | author | 1897–1968 |
| Vasily Blyukher | Soviet military commander | 1889–1938 |
| Charles Maung Bo | Burmese Roman Catholic Archbi… | 1948 |
| Wang Bo | Tang Dynasty poet | 650–676 |
| Augusto Boal | Brazilian writer | 1931–2009 |
| Charles Boarman | US Navy Rear Admiral | 1795–1879 |
| Franz Boas | German-American anthropologist | 1858–1942 |
| David Boaz | libertarian, author and editor | 1953 |
| Norberto Bobbio | Italian legal scholar | 1909–2004 |
| Ricky Bobby | | |
| Martin Bobrow | geneticist | 1938 |
| Johannes Bobrowski | German author | 1917–1965 |
| Giovanni Boccaccio | Italian author and poet | 1313–1375 |
| Leo Boccardi | Italian nuncio | 1953 |
| Umberto Boccioni | Italian painter and sculptor | 1882–1916 |
| Mel Bochner | American artist | 1940 |
| Bodhidharma | Chinese philosopher and Buddh… | 483–540 |
| Christoffer Boe | Danish filmmaker | 1974 |
| Lauren Boebert | American politician | 1986 |
| Barry Boehm | American software engineer | 1935 |
| John Boehner | Former Speaker of the United … | 1949 |
| Allan Boesak | South African anti-apartheid … | 1946 |
| Paul Boese | | |
| Ivan Boesky | American investor, white-coll… | 1937 |
| Anicius Manlius Severinus Boethius | philosopher of the early 6th … | 480 |
| Étienne de La Boétie | French judge, writer and phil… | 1530–1563 |
| Humphrey Bogart | American actor | 1899–1957 |
| Neil Bogart | American music executive | 1943–1982 |
| Alexander Bogdanov | Physician, philosopher, writer | 1873–1928 |
| Grace Lee Boggs | social activist and feminist | 1915–2015 |
| Hale Boggs | American politician | 1914–1972 |
| John Bogle | | 1929–2019 |
| Eric Bogosian | actor, playwright, monologist… | 1953 |
| John of Bohemia | Czech king and warrior | 1296–1346 |
| Chris Bohjalian | American novelist | 1962 |
| Nils Bohlin | Swedish inventor | 1920–2002 |
| David Bohm | American theoretical physicist | 1917–1992 |
| Jakob Böhme | German Christian mystic and t… | 1575–1624 |
| Aage Niels Bohr | Danish physicist | 1922–2009 |
| Niels Bohr | Danish physicist | 1885–1962 |
| Karanvir Bohra | Indian actor | 1982 |
| Matteo Maria Boiardo | Italian writer | 1441–1494 |
| Nicolas Boileau-Despréaux | French poet and critic | 1636–1711 |
