Ian Williams

Ian Williams may refer to:


 * Ian Williams (American football) (born 1989), Notre Dame nose tackle
 * Ian Williams (fencer) (born 1967), British fencing coach
 * Ian Williams (footballer, born 1942), Australian rules footballer for Geelong
 * Ian Williams (footballer, born 1957), Australian rules footballer for Swan Districts and Footscray
 * Ian Williams (musician) (born 1970), American guitarist
 * Ian Williams (rugby union) (born 1963), Australian rugby union player
 * Ian Williams (sailor) (born 1977), British sailor
 * Ian Williams (speedway rider) (born 1931), Welsh speedway rider
 * Ian Williams (tennis) (born 1971), American tennis player
 * Ian Williams (writer), Canadian poet and fiction writer