is a city in Gallatin County, Illinois, United States. The population was 1,410 at the 2000 census. It is the county seat of Gallatin County. See Old Shawneetown, Illinois for the historical village.
According to the United States Census Bureau, the city has a total area of 1.2 square miles (3.2 km²), of which, 1.2 square miles (3.1 km²) of it is land and 0.04 square miles (0.1 km²) of it (75.694%) is water.