Flandreau FLAN-droo is a city in and county seat of Moody County, South Dakota, United States. The population was 2,341 at the 2010 census. It was named in honor of Charles Eugene Flandrau, a judge in the territory and state of Minnesota, who is credited with saving the community of New Ulm, Minnesota, from destruction during conflict with the Sioux tribe in 1862. In 2015, the nearby Flandreau Indian Reservation had planned to open the nation's first... Show more

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