Buffalo County is located in the central part of South Dakota, bordered by the Missouri River to the east. Established in 1883, it covers an area of approximately 1,900 square miles. The county seat is Gann Valley, which serves as the administrative center for local government. The population of Buffalo County is relatively small, with a diverse mix of communities. The economy is primarily based on agriculture, with farming and ranching being significant contributors. The county is known for its scenic landscapes, including rolling hills and open prairies, making it a unique part of the Great Plains.