Cosby is a village in Andrew County, Missouri, United States.

Cosby was founded in the late 1870s, and moved about one mile to a new town site in 1885 when the railroad was extended to that point.

[5] According to the United States Census Bureau, the village has a total area of 0.09 square miles (0.23 km2), all land.

17.8% of all households were made up of individuals, and 13.4% had someone living alone who was 65 years of age or older.

25.5% of all households were made up of individuals, and 7.3% had someone living alone who was 65 years of age or older.

There were none of the families and 4.5% of the population living below the poverty line, including no under eighteens and none of those over 64.