Fort Calhoun is a city in Washington County, Nebraska, United States.

[5] According to the United States Census Bureau, the city has a total area of 0.65 square miles (1.68 km2), all land.

There were 413 housing units at an average density of 635.4 per square mile (245.3/km2).

32.7% of all households were made up of individuals, and 15.3% had someone living alone who was 65 years of age or older.

30.4% of all households were made up of individuals, and 15.5% had someone living alone who was 65 years of age or older.

About 3.1% of families and 3.8% of the population were below the poverty line, including 4.1% of those under the age of 18 and 6.0% of those 65 and older.