 These were further consolidated in the 1980s to form District 1, District 2, and District 3.Ohio County is one of four counties in the United States to border a state with which it shares the same name (the other three counties are Nevada County, California, Texas County, Oklahoma, and Delaware County, Pennsylvania).As of the census of 2000, there were 47,427 people, 19,733 households, and 12,155 families residing in the county.