Ohio
From just over 45,000 residents in 1800, Ohio's population grew at rates of over 10% per decade (except for the 1940 census) until the 1970 census, which recorded just over 10.65 million Ohioans. Growth then slowed for the next four decades. The United States Census Bureau estimates that the population of Ohio was 11,689,442 on July 1, 2018, a 1.33% increase since the 2010 United States Census. Ohio's population growth lags that of the entire United States, and Caucasians are found in a greater density than the United States average. , Ohio's center of population is located in Morrow County, in the county seat of Mount Gilead. This is approximately south and west of Ohio's population center in 1990.
Ohio County, West Virginia
According to the U.S. Census Bureau, the county has a total area of , of which is land and (2.9%) is water. It is the third-smallest county in West Virginia by area. The highest point of elevation in Ohio County is approximately and located about southwest of West Alexander, Pennysylvania.
The county is drained by Wheeling and other small creeks.
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. The population density was 447 people per square mile (172/km²). There were 22,166 housing units at an average density of 209 per square mile (81/km²). The racial makeup of the county was 94.50% White, 3.57% Black or African American, 0.09% Native American, 0.78% Asian, 0.03% Pacific Islander, 0.13% from other races, and 0.91% from two or more races. 0.50% of the population were Hispanic or Latino of any race. 27.0% were of German, 13.7% Irish, 10.4% English, 8.4% Italian, 8.3% American and 6.7% Polish ancestry.