About This Place
Laddonia is a city in Audrain County, Missouri, United States. The population was 620 at the 2000 census.
Laddonia is located at 39°14′25″N 91°38′37″W / 39.24028°N 91.64361°W / 39.24028; -91.64361 (39.240331, -91.643501).
According to the United States Census Bureau, the city has a total area of 0.6 square miles (1.4 km²), all of it land.