Koshkonong is a city in Oregon County, Missouri, United States.

[6] According to the United States Census Bureau, the city has a total area of 0.18 square miles (0.47 km2), all land.

There were 102 housing units at an average density of 566.7 per square mile (218.8/km2).

28.2% of all households were made up of individuals, and 12.9% had someone living alone who was 65 years of age or older.

There were 108 housing units at an average density of 573.0 per square mile (221.2/km2).

The racial makeup of the town was 94.63% White, 1.95% Native American, 1.46% Asian, and 1.95% from two or more races.

36.3% of all households were made up of individuals, and 20.9% had someone living alone who was 65 years of age or older.