Gallatin is a city in and the county seat of Sumner County, Tennessee. The population was 30,678 at the 2010 census and 32,307 in 2013.
Gallatin was established in 1802 as the permanent county seat of Sumner County, Tennessee, in what is called the Middle Tennessee region. The town was named after Albert Gallatin, Secretary of Treasury to presidents Thomas Jefferson and James Madison. Andrew Jackson became one of the first to purchase a lot when the town was surveyed and platted in 1803. The town was built around a traditional plan of an open square. Jackson founded the first general store in Gallatin. In 1803 the first courthouse and jail were built on the central town square. In 1815, the town was first incorporated. In the mid-20th century, it operated under a Charter established by a 1953 Private Act of the State Legislature.