Ladonia is an unincorporated community and census-designated place (CDP) in Russell County, Alabama, United States.

It is part of the Columbus, Georgia-Alabama, Metropolitan Statistical Area.

[2] According to the U.S. Census Bureau, the community has a total area of 3.1 square miles (8.0 km2), all land.

There were 1,407 housing units at an average density of 439.5 per square mile (169.7/km2).

23.0% of all households were made up of individuals, and 7.8% had someone living alone who was 65 years of age or older.

There were 1,392 housing units at an average density of 449.0 per square mile (173.4/km2).

24.7% of all households were made up of individuals, and 8.2% had someone living alone who was 65 years of age or older.