Belle is a city in northeast Maries County and extending north into southeast Osage County in the U.S. state of Missouri. The population was 1,381 at the 2020 census, down from 1,545 in 2010.

Maries County is a county located in the U.S. state of Missouri. As of the 2020 census, its population was 8,432. Its county seat is Vienna. The county was organized March 2, 1855, and named for the Maries River and Little Maries River. The word "Maries" is derived from the French word marais, which means "marsh, lake, or pond".