Theodosia is a village in Ozark County, Missouri, United States.

There were 226 housing units at an average density of 165.0 per square mile (63.7/km2).

37.7% of all households were made up of individuals, and 21.4% had someone living alone who was 65 years of age or older.

There were 155 housing units at an average density of 115.1 per square mile (44.4/km2).

31.3% of all households were made up of individuals, and 16.1% had someone living alone who was 65 years of age or older.

About 20.0% of families and 28.8% of the population were below the poverty line, including 41.1% of those under the age of eighteen and 8.8% of those 65 or over.