Alan, Allan, or Allen Clark, may refer to:

• Alan Charles Clark (1919-2002), Bishop of East Anglia
• Alan Clark (1928-1999), British politician
• Alan Clark (keyboardist) (born 1952), British keyboardist with Dire Straits
• Alan M. Clark (born 1957), American author and illustrator
• Allan Clark (born 1957), American football running back for the Green Bay Packers
• Allen George Clark (1898-1962), American-born British industrialist

Alan, Allan, or Allen Clarke may refer to:

• Alan Clarke (1935-1990), British film director
• Alan Clarke (sports commentator), BBC Sports Commentator
• Alan W. Clarke, American academic
• Allen Clarke (educationalist) (1910-2007), British academic
• Allan Clarke (singer) (born 1942), English singer with The Hollies
• Allan Clarke (footballer) (born 1946), English footballer

[ Source: Wikipedia ]