is a city in Washington County, Nebraska, United States. The population was 856 at the 2000 census.
Fort Calhoun Nuclear Generating Station is built on 660 acres (2.7 km²). This historic town includes Fort Atkinson, the first fort built west of the Missouri river.
According to the United States Census Bureau, the city has a total area of 0.6 square miles (1.6 km²), all of it land.