Authors Born on October 21
- Ellen Wittlinger Author, 1948
- Elvin Bishop Musician, 1942
- Emmeline Pethick-Lawrence, Baroness Pethick-Lawrence Activist, 1867
- Enoch Fitch Burr Theologian, 1818
- Evan Harris Politician, 1965
- Everett McGill Actor, 1945
- Fabio Novembre Architect, 1966
- Farooq Abdullah Politician, 1937
- Garry Breitkreuz Politician, 1945
- Geoffrey Boycott Cricketer, 1940
- Georg Solti Operatic Conductor, 1912
- George Combe Lawyer, 1788
- George Vandeman Evangelist, 1916
- Hal Duncan Writer, 1971
- Hari Kondabolu Comedian, 1982
- Jade Jagger Designer, 1971
- Jane McGonigal Game Designer, 1977
- Jeffrey Bowyer-Chapman Actor, 1984
- Jeremy Miller Actor, 1976
- John W. Dawson Politician, 1820
- Jose Rodriguez Intelligence Officer, 1948
- Judy Sheindlin Lawyer, 1942
- Kane Brown Singer, 1993
- Kathy Young Musician, 1945
- Keak da Sneak Rapper, 1977
- Keith Green Pianist, 1953
- Ken Watanabe Actor, 1959
- Kim Kardashian Television Presenter, 1980
- L. Welch Pogue Aviator, 1899
- LaTanya Richardson Actress, 1949
- Leo Burnett Founder, 1891
- Malcolm Arnold Composer, 1921
- Manfred Mann Musician, 1940
- Mark Parker Businessman, 1955
- Martin Gardner Mathematician, 1914
- Mary Pipher Clinical Psychologist, 1947
- Matt Dallas Actor, 1982
- Matthew Ramsey Songwriter, 1977
- Megan Smith Businesswoman, 1964
- Michael McMillian Actor, 1978