John Williams (New South Wales colonial politician)

John Williams (1821 – 20 October 1891) was an Australian politician.

He was a member of Sydney City Council from 1849 to 1853 and from 1857 to 1861, and served as mayor in 1858. In May 1861 he was one of Charles Cowper's 21 appointments to the New South Wales Legislative Council, but he never took his seat. He was Crown Solicitor from 1859 to 1891, when he died in Sydney.