Authors Born on April 20
- Adolf Hitler Politician, 1889
- Alan Arnett McLeod Soldier, 1899
- Alan Buckley Football Manager, 1951
- Alexander Lebed Military Officer, 1950
- Alexander Zverev Tennis Player, 1997
- Alexis Taylor Musician, 1980
- Allan Houston Basketball Player, 1971
- Andre Sainte-Lague Mathematician, 1882
- Andrew Tobias Journalist, 1947
- Andy Serkis Actor, 1964
- Antony Jay Writer, 1930
- April Gornik Artist, 1953
- Arin Paul Film Director, 1980
- Arthur Ashin Singer-Songwriter, 1982
- Arto Paasilinna Writer, 1942
- Ashfaq Parvez Kayani Soldier, 1952
- Ashton Moio Actor, 1992
- Atifete Jahjaga Politician, 1975
- Aubrey de Grey Author, 1963
- Avis Bohlen Diplomat, 1940
- Aviva Chomsky Historian, 1957
- Betty Cuthbert Athlete, 1938
- Billy Magnussen Actor, 1985
- Blanche Wiesen Cook Historian, 1941
- Bob Bartlett Politician, 1904
- Brad Templeton Software Developer, 1960
- Carrie Mae Weems Artist, 1953
- Clint Howard Actor, 1959
- Crispin Glover Actor, 1964
- Dan Benishek Politician, 1952
- Daniel Stamm Film Director, 1976
- Danielle Crittenden Author, 1963
- David Brainerd Missionary, 1718
- David Chalmers Philosopher, 1966
- David Filo Businessman, 1966
- David Whyte Football Player, 1971
- Dinah Maria Mulock Novelist, 1826
- Don Mattingly Baseball Player, 1961
- Donald Wolfit Actor, 1902
- Edie Sedgwick Actress, 1943