Ian Williams
Ian Williams may refer to:
- Ian Williams (American football), Notre Dame nose tackle
- Ian Williams (fencer), 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), American guitarist
- Ian Williams (rugby union), Australian rugby union player
- Ian Williams (sailor), British sailor
- Ian Williams (speedway rider), Welsh speedway rider
- Ian Williams (tennis), American tennis player
- Ian Williams (writer), Canadian poet and fiction writer