Please add profiles of those who were born, lived or died in Yazoo County, Mississippi. Official Website The area which is now Yazoo County was acquired by the State of Mississippi from the Choctaw Indians in 1820. Yazoo County was established on January 21, 1823. It is named for the Yazoo River, which forms its western border. Its name is said to come from a Choctaw language word meaning "Ri...