Jett is an unincorporated community within Franklin County, Kentucky, United States. It was part of a farm acquired by Thomas Jett, in 1822. In 1882, Jett's heirs donated land for a Louisville & Nashville Railroad station which was named for him. Its post office (originally known as Fogg, KY for a few months) is closed, being open from 1883 to March 31, 1971. The community is located near the junction of Interstate 64 and US 60.