Dadeville is a village in Dade County, Missouri, United States.

[5] A post office called Melville opened in 1853, and the name was changed to Dadeville in 1858.

[7] According to the United States Census Bureau, the village has a total area of 0.99 square miles (2.56 km2), all land.

The racial makeup of the village was 96.2% White, 0.9% Native American, 0.4% Asian, and 2.6% from two or more races.

18.9% of all households were made up of individuals, and 11.1% had someone living alone who was 65 years of age or older.

23.7% of all households were made up of individuals, and 12.9% had someone living alone who was 65 years of age or older.

About 19.1% of families and 16.0% of the population were below the poverty line, including 13.4% of those under the age of eighteen and 15.9% of those 65 or over.