Authors Born on April 1
- Paul Manafort Lobbyist, 1949
- Phil Niekro Baseball Player, 1939
- Rachel Maddow Journalist, 1973
- Randy Orton Wrestler, 1980
- Sam Huntington Television Actor, 1982
- Samuel Alito Magistrate, 1950
- Samuel R. Delany Author, 1942
- Sandro Veronesi Novelist, 1959
- Sean Taylor American Football Player, 1983
- Sung Hi Lee Model, 1970
- Susan Boyle Singer, 1961
- Taran Killam Actor, 1982
- Wangari Maathai Developmental Biologist, 1940
- Whittaker Chambers Writer, 1901
- Will Harvey Physician, 1578
- William Chalmers Burns Evangelist, 1815
- William F. Lynch Officer, 1801
- William Harvey Physician, 1578
- William Manchester Author, 1922
- William Tapley Bennett Jr. Diplomat, 1917
- Winfried Vahland Chairperson, 1957