John Williams (born 8 June 1937) is a retired Welsh snooker referee.
He refereed eleven World Snooker Championship finals, nine at the Crucible Theatre, including the 1985 final between Dennis Taylor and Steve Davis – the most watched snooker match in history.
A look at the 1985 Snooker World Championship final when Steve Davis and Dennis Taylor battled past midnight as over 18 million people watched on television.