John Gordon Thorne Jackett (21 October 1912 – 11 January 2003) was an Australian politician.
He was the Liberal member for Burwood in the New South Wales Legislative Assembly from 1965 to 1978.
In 1940, he enlisted in the AIF, serving in the Middle East, Darwin and New Guinea until 1945.
In 1961, Jackett married Bethyl Margaret McKerihan, with whom he had two children.
[1] In 1965, Jackett contested Liberal preselection for the state seat of Burwood and defeated the sitting member, Ben Doig.