| Born | 8 June 1937 Ruabon, Wrexham, Wales |
|---|---|
| Sport country |  Wales |
| Professional | c.1960s–2002, 2011-2012 |
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. Having begun refereeing in the 1960s, Williams left the civil service in 1981 to work as a referee full-time. Having the chance to referee tournaments at Pontins, he quickly took charge and organised the events for many years. He gained national attention following a match between Fred Davis and Alex Higgins where the roof collapsed after rainfall and flooded the snooker table. Williams was pictured in many national newspapers after the event, resulting in more television coverage.
He was the longstanding referee for snooker television show Pot Black, taking charge after Sydney Lee's retirement at the 1981 event. Williams was forced into retirement in 2002 due to contract negotiations with the World Professional Billiards and Snooker Association, but made sporadic appearances at the World Seniors Championship until 2012.