Caledonia is a village in southern Washington County, Missouri, United States.

[6] The Caledonia Historic District, Land Archeological Site, Lost Creek Pictograph Archeological Site, and Harrison Queen House are listed on the National Register of Historic Places.

[8] According to the United States Census Bureau, the village has a total area of 0.16 square miles (0.41 km2), all land.

There were 76 housing units at an average density of 475.0 per square mile (183.4/km2).

31.0% of all households were made up of individuals, and 17.2% had someone living alone who was 65 years of age or older.

There were 79 housing units at an average density of 567.0 per square mile (218.9/km2).

30.3% of all households were made up of individuals, and 16.7% had someone living alone who was 65 years of age or older.

The reason for the unconventional structures are because of their ability to withstand severe weather.