About This Place
Sumner is a city in Chariton County, Missouri, United States. The population was 142 at the 2000 census, at which time it was a town.
Sumner is located at 39°39′23″N 93°14′36″W / 39.65639°N 93.24333°W / 39.65639; -93.24333 (39.656342, -93.243426).
According to the United States Census Bureau, the town has a total area of 0.3 square miles (0.7 km²), all of it land.