Sir Cyril Smith (1928–2010) was a British Liberal Democrat politician.

Cyril Smith may also refer to:

Cyril Stanley Smith (1903–1992), British metallurgist and historian of science Cyril Smith (actor) (1892–1963), British actor Cyril Smith (cricketer) (1926–2009), Queensland opening bowler Cyril Smith (pianist) (1909–1974), English classical pianist Cyril Smith (Marxist) (1929–2008), British lecturer of statistics, socialist and revolutionary humanist Cyril Smith (footballer) (1893–?), Welsh footballer