Nationality Australian Name John Williams | Political party The Nationals | |
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John Reginald Williams (born 16 January 1955) is an Australian politician. He has been a The Nationals member of the Australian Senate since July 2008, representing the state of New South Wales.

Williams was first elected to the Senate at the 2007 federal election. This followed his victory over incumbent Senator Sandy Macdonald in preselection for the National Party's one winnable spot on the Coalition Senate ticket in New South Wales.
Williams was born in Jamestown, South Australia. Prior to entering politics, he was a truck driver, a farmer, a sheep shearer and a small business owner.
Williams vote was the third out of five votes required to give Barnaby Joyce the Senate leadership in September 2008.
Referring to the ministerial resignation of Jamie Briggs in December 2015, Williams said "With Briggs leaving it means there will be no deterioration in the overall quality of the ministry, in fact it should improve."