Namesakes
Canadian Prime Ministers:
1 prime minister
Joe Clark 1979-1980 
Hall-of-Famers:
1 football
(football) Earl "Dutch" Clark 1963
Notable Actors and Actresses:
2 actors, 2 actresses
Wallis Clark 1882-1961
Liddy Clark 1953-
Kjeld Gogosha-Clark 1967-
Christie Clark 1973-
Notable Athletes:
1 driving, 1 football, 1 soccer
(football) Earl "Dutch" Clark 1906-1978
(driving) Jim Clark 1936-1968
(soccer) Ciaran Clark 1989-
Notable Businesspeople:
2 businesspersons
William A. Clark Sr. 1839-1925
Kjeld Gogosha-Clark 1967-
Notable Explorers and Adventurers:
1 explorer
William Clark 1770-1838
Notable Politicians and Statespeople:
1 politician
William A. Clark Sr. 1839-1925
Olympic Medalists:
5 silver, 3 bronze, 3 gold, 2 silver/gold, 1 gold/bronze
(gold) Ellery Harding Clark 1896 high jump; long jump
(silver) William Clark 1904 archery - team round
(silver) Arthur Clark 1924 3000 m team
(bronze) Marjorie Clark 1932 80 m hurdles
(silver) Bob Clark 1936 decathlon
(gold) Emory Clark 1964 rowing
(gold) Stephen Clark 1964 swimming - 4x100 m freestyle relay; swimming - 4x100 m medley relay; swimming - 4x200 m freestyle relay
(bronze) Barbara Clark 1976 swimming - 4x100 m freestyle relay
(bronze) Mary Ellen Clark 1992; 1996 diving - platform
(silver/gold) Jearl Miles Clark 1992; 1996; 2000 4x400 m relay
(silver/gold) Eldece Clark-Lewis 1996; 2000 4x100 m relay
(silver) Karen Clark 1996 synchronized swimming - team
(silver) Saskia Clark 2012 sailing
(gold/bronze) Kelly Clark 2002; 2010; 2014 snowboarding
Other Leaders:
1 prime minister
Prime Minister Helen Clark 1999-2008 New Zealand