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.
Cincinnati
As of the 2000 census, the Cincinnati-Middletown−Wilmington Metropolitan Statistical Area has a population of 2,155,137 people, making it the 24th-largest metropolitan statistical area in the country. It includes the Ohio counties of Hamilton, Butler, Warren, Clermont, Clinton and Brown, as well as the Kentucky counties of Boone, Bracken, Campbell, Gallatin, Grant, Kenton, and Pendleton, and the Indiana counties of Dearborn, Franklin, and Ohio.