Sid Williams (disambiguation)

Sid Williams (born 1942) is a former American football linebacker and diplomat.

Sid, Syd, Sidney or Sydney Williams may also refer to:


 * Sidney Williams (author) (born 1962), American author
 * Sidney Williams (baseball) (1914–2006), American baseball pitcher
 * Sid E. Williams (1928–2012), American chiropractor and founder of Life University
 * Sid Williams (footballer) (1919–2003), English association footballer for Bristol City from 1937 to 1952
 * Sid Williams (rugby league), Australian rugby footballer who played in the 1960s and 1979s
 * Syd Williams (1918–1976), Welsh rugby union and rugby league footballer
 * Sid Williams Theatre is the major performance theatre in the Comox Valley, Courtenay, British Columbia, Canada