Sir John "Hugh" Williams, KNZM, QC (born 23 September 1939) is the current President of the New Zealand Electoral Commission and a retired Judge of High Court of New Zealand.
Williams was educated at Wellington College, Gisborne Boys' High School and graduated with a LLM (Hon) from Victoria University of Wellington.
Williams was appointed a Queen's Counsel in 1988 and a High Court Justice in 1997. He was the Senior Puisne Judge and was previously for 6 years a Master (Associate Judge) of the High Court. He was for many years the longest serving Judge based at the High Court of New Zealand at Auckland until he retired on 22 September 2009.
Williams was the Criminal List Judge for Auckland, and presided over many high profile trials, including the 2007 trials of Gardner and Kahui.
Williams was a former Chancellor of Massey University from 1990–1997, City Councillor for Palmerston North City from 1983-1989. He is a former President of the New Zealand Law Society and a current a trustee of the Kea Conservation Trust.
On 7 June 2010, Williams was made an Additional Knight Companion of the New Zealand Order of Merit in the Queen's Birthday Honours List.