William Patrick Kelly (29 March 1875 – 9 December 1932) was an Australian politician.
He was born at Bathurst to Patrick Kelly and Elizabeth Quinn.
He attended St Stanislaus' College and was articled to a solicitor, being admitted to practice in 1900.
On 26 June 1896 he married Katie Boyle, with whom he had nine children.
In 1925 he was appointed to the New South Wales Legislative Council as a Labor member, but he was expelled from the party the following year after he did not vote to abolish the Council.